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Alanine

18 benefits mapped to clinical evidence across supplements.

Dose per serving from products

808 products in our catalogue print how much Alanine a serving holds.

Most common: 1 g to 2.5 g, 48% of 808 products.

Dose per servingProducts
50 mg or less
40
50 mg to 100 mg
18
100 mg to 250 mg
42
250 mg to 500 mg
59
500 mg to 1 g
233
1 g to 2.5 g
387
over 2.5 g
29

Dose per serving from research

9 study groups in 8 studies say how much Alanine participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 25 g to 50 g, 56% of 9 study groups.

Daily doseStudy groups
1 g or less
1
1 g to 2.5 g
0
2.5 g to 5 g
1
5 g to 10 g
2
10 g to 25 g
0
25 g to 50 g
5

See every study group

Benefit Evidence

ALT/liver tests↓

Liver histology/viral clearance↑

61,160 people

Alanine↓ ketogenesis↑

Glucose/urea↑ alanine↓

ALT↓ liver metabolism

54,149 people

Alanine↓ glucose↓

Alanine↑ glucose↑

Ketosis shifts alanine

49,518 people

Protein synthesis/retention

Alanine transport/levels

3,171 people

Fatigue↓, energy↑

Ketosis/alanine shift

Work capacity↑, fatigue↓

1,736 people

Alanine oxidation +15%

Nitrogen balance improved

Alanine transport ↓30%

1,352 people

Amino acids +N balance

Protein accretion +lean mass

900 people

Muscle sparing +N balance

Carnosine/power gains

744 people

Lactate↓, alanine↑

Carnosine↑, fatigue↓

647 people
Endurance
Moderate

Endurance +24% TTE

Strength/lean mass gains

Glycogen sparing −19

636 people

Immune boost, infections ↓

Cytokines/ALT, +23% remission

866 people

Detox enzyme suppression

+80% metabolite reduction

629 people
Vitality
Moderate

Alanine ↓/↑ energy

Performance/fatigue +20%

236 people
Mood balance
Moderate

Mood: ↓ depression

Mood: mixed; ↑ anxiety

259 people
Skin repair
Moderate

Mucositis ↓14/20

Severity/duration ↓

Infections/complications ↓

216 people

↑ Alanine, satiety

-5.57% bodyweight, appetite

108 people

Wound infections, shorter stay

Hair density, less shedding

159 people

Hormone balance +alanine

Glucose/IGF-I shifts

53 people

Research sources

Liver support (59)
  1. Metabolic syndrome and alanine aminotransferase: a global perspective from the NAVIGATOR screening population

    PubMed ID: 20002471

    Large epidemiologic analysis focused on ALT clustering with metabolic syndrome—very relevant to liver biomarker interpretation.

  2. Peginterferon alfa-2b as monotherapy or in combination with lamivudine in patients with HBeAg-negative chronic hepatitis B: a randomised study

    PubMed ID: 19179968

    Peginterferon study reports ALT as a key biochemical endpoint—directly liver-related.

  3. Surrogate end points and long-term outcome in patients with chronic hepatitis B

    PubMed ID: 19500693

    Chronic hepatitis B trial where ALT normalization and histologic response predicted fewer liver complications—highly liver-specific.

  4. Phase II randomized study of trabectedin given as two different every 3 weeks dose schedules (1.5 mg/m2 24 h or 1.3 mg/m2 3 h) to patients with relapsed, platinum-sensitive, advanced ovarian cancer

    PubMed ID: 19556318

    Study documents frequent alanine aminotransferase (ALT) elevations with trabectedin—directly relevant to liver enzyme outcomes.

  5. Major liver resection results in a changed plasma amino acid pattern as reflected by a decreased Fischer ratio which improves by bactericidal/permeability increasing protein

    PubMed ID: 11169074

    Direct measurement of plasma alanine rise after major liver resection and correlation with hepatic failure duration—strongest alanine‑related liver signal in dataset.

  6. Interferon alfa-2b alone or in combination with ribavirin for the treatment of relapse of chronic hepatitis C. International Hepatitis Interventional Therapy Group

    PubMed ID: 9819447

    Interferon plus ribavirin improved ALT normalization and virologic cure in HCV — clear liver-function benefit.

  7. Efficacy of high dose of recombinant alpha 2b interferon on long term response in chronic hepatitis C and cirrhosis: prospective randomized multicentre study

    PubMed ID: 9836109

    Higher‑dose interferon for 12 months improved long-term HCV RNA loss and ALT outcomes — relevant to liver function.

  8. Interferon-alpha-2B and ribavirin in combination for chronic hepatitis C patients not responding to interferon-alpha alone: an Italian multicenter, randomized, controlled, clinical study

    PubMed ID: 9860407

    Ribavirin+interferon markedly improved ALT normalization in HCV nonresponders — clear liver-function outcome (therapeutic trial).

  9. A one-year trial of lamivudine for chronic hepatitis B. Asia Hepatitis Lamivudine Study Group

    PubMed ID: 9654535

    Lamivudine produced substantial ALT normalization and histologic improvement in chronic HBV — directly relevant to liver function (drug study).

  10. Metadoxine accelerates fatty liver recovery in alcoholic patients: results of a randomized double-blind, placebo-control trial. Spanish Group for the Study of Alcoholic Fatty Liver

    PubMed ID: 9537864

    Metadoxine RCT markedly improved ALT and fatty liver on ultrasound — strong liver-function signal (though not an alanine supplement trial).

  11. The long-term effect of treatment with interferon-alpha 2a in chronic hepatitis B. The Long-Term Follow-up Investigator Group. The European Study Group on Viral Hepatitis (EUROHEP). Executive Team on Anti-Viral Treatment

    PubMed ID: 9857348

    Long-term follow-up showing interferon responders often keep ALT improvements — liver-function relevance.

  12. A pilot randomized, controlled trial of the effect of iron depletion on long-term response to alpha-interferon in patients with chronic hepatitis C

    PubMed ID: 9551672

    Phlebotomy reduced ALT in chronic HCV patients — direct improvement in a liver enzyme marker.

  13. The effects of short-term parenteral nutrition on human liver protein and amino acid metabolism during laparoscopic surgery

    PubMed ID: 9406129

    Direct measurement: short-term TPN raised free hepatic alanine concentrations — directly relevant to hepatic amino-acid handling and metabolism.

  14. Effects of ursodeoxycholic acid on serum liver enzymes in patients with hepatitis C virus-related chronic liver disease

    PubMed ID: 7712308

    UDCA treatment caused substantial ALT reductions in HCV‑related liver disease—directly relevant to liver enzyme improvement (not alanine supplementation).

  15. Ability of prolonged interferon treatment to suppress relapse after cessation of therapy in patients with chronic hepatitis C: a multicenter randomized controlled trial

    PubMed ID: 7843696

    Extending interferon to 52 weeks increased sustained ALT normalization and reduced relapse — important liver outcome.

  16. Treatment of chronic hepatitis B in children with prednisone followed by alfa-interferon: a controlled randomized study

    PubMed ID: 8006395

    Sequential prednisone/interferon normalized ALT and cleared virus in many children — clear effect on liver biochemistry via therapy.

  17. A randomized controlled trial of interferon alfa-2b as therapy for chronic non-A, non-B hepatitis

    PubMed ID: 2127787

    Interferon reduced ALT in many treated patients with dose-related histologic effects (hepatitis therapy context).

  18. Ursodeoxycholic acid for the treatment of primary biliary cirrhosis. Interim analysis of a double-blind multicentre randomized trial. The UDCA-PBC Study Group

    PubMed ID: 1975819

    Large randomized trial: UDCA produced consistent improvements in ALT, bilirubin and alkaline phosphatase.

  19. Combined effects of alcohol and hepatitis C: a secondary analysis of alcohol use biomarkers and high-risk behaviors from two medication trials for alcohol dependence

    PubMed ID: 19783106

    HCV status influenced transaminases, complicating biomarker use in alcohol treatment seekers—relevant to liver enzyme interpretation.

  20. Immunopathogenesis of hepatic flare in HIV/hepatitis B virus (HBV)-coinfected individuals after the initiation of HBV-active antiretroviral therapy

    PubMed ID: 19231993

    HBV DNA/ALT predicted hepatic flares after ART initiation—high relevance to liver disease and ALT dynamics.

  21. [Evaluation of Chai Shao Liu Jun Tang for the treatment of chronic hepatitis B]

    PubMed ID: 19567023

    Herbal + lamivudine improved ALT normalization and viral/serologic responses in chronic hepatitis B—direct liver outcome data.

  22. Safety, pharmacokinetics and antiviral effect of BILB 1941, a novel hepatitis C virus RNA polymerase inhibitor, after 5 days oral treatment

    PubMed ID: 19320234

    HCV polymerase inhibitor trial reported dose-dependent viral suppression but limited by GI intolerance and liver enzyme rises—direct ALT relevance.

  23. Ischemic preconditioning (IP) of the liver as a safe and protective technique against ischemia/reperfusion injury (IRI)

    PubMed ID: 19519822

    Ischemic preconditioning before transplant reduced AST/ALT and histologic injury in marginal grafts—relevant to hepatic protection strategies.

  24. [Magnesium isoglycyrrhizinate in the treatment of chronic liver diseases: a randomized, double-blind, multi-doses, active drug controlled, multi-center study]

    PubMed ID: 19958646

    Magnesium isoglycyrrhizinate reduced ALT/AST in chronic liver disease—direct clinical liver benefit data (not alanine).

  25. Influence of alpha-1 glycoprotein acid concentrations and variants on atazanavir pharmacokinetics in HIV-infected patients included in the ANRS 107 trial

    PubMed ID: 19995932

    Atazanavir PK correlated with ALT and acute-phase proteins—relevant to drug-liver enzyme interactions.

  26. [Effects of supplementation with the antioxidant flavonoid, silymarin, in chronic hepatitis C patients treated with peg-interferon + ribavirin. A placebo-controlled double blind study]

    PubMed ID: 19103558

    Silymarin trial measured ALT and oxidative stress markers in hepatitis C—directly liver-focused.

  27. Serum ferritin level changes in children with sickle cell disease on chronic blood transfusion are nonlinear and are associated with iron load and liver injury

    PubMed ID: 19721013

    Transfusion-dependent children: ferritin and ALT relations highlight liver iron injury—relevant to liver function assessment.

  28. Efficacy and safety of addition of minor bloodletting (petit phlebotomy) in hepatitis C virus-infected patients receiving regular glycyrrhizin injections

    PubMed ID: 19352587

    Petit phlebotomy plus glycyrrhizin led to significant ALT and ferritin reductions in HCV patients—direct liver improvement data.

  29. Safety of Switching Nevirapine Twice Daily to Nevirapine Once Daily in Virologically Suppressed Patients

    PubMed ID: 19214120

    Nevirapine dosing trial compared hepatotoxicity event-free rates using ALT/AST—directly liver-safety relevant.

  30. A randomized, double-blind, placebo-controlled trial of recombinant human alpha-interferon therapy for chronic non-A, non-B (type C) hepatitis

    PubMed ID: 2127786

    Interferon alfa‑2b reduced aminotransferases and improved histology during therapy—liver‑related evidence.

  31. Therapeutic effects of reduced glutathione on liver function, fibrosis, and HBV DNA clearance in chronic hepatitis B patients

    PubMed ID: 39920583

    Reduced glutathione with entecavir resulted in marked ALT normalization and improved fibrosis markers—strong hepatic benefit (not alanine supplement).

  32. The Improvement Effects of Weizmannia coagulans BC99 on Liver Function and Gut Microbiota of Long-Term Alcohol Drinkers: A Randomized Double-Blind Clinical Trial

    PubMed ID: 39861457

    Probiotic BC99 improved AST and inflammatory markers in long-term drinkers, reflecting better liver-related inflammation/function.

  33. The effects of ellagic acid in metabolic dysfunction-associated steatotic liver disease (MASLD) patients: a randomized, add-on, double-blind, controlled trial

    PubMed ID: 40877731

    Ellagic acid plus diet produced large reductions in hepatic fat and ALT—direct liver-function improvements.

  34. The effects of next generation probiotics on metabolic dysfunction-associated steatotic liver disease: a parallel, double-blind, randomized, placebo-controlled trial

    PubMed ID: 41366779

    Selected probiotic (LL001) significantly lowered ALT/AST and improved coagulation parameters in MASLD patients.

  35. Patient-reported outcomes in chronic hepatitis delta: An exploratory analysis of the phase III MYR301 trial of bulevirtide

    PubMed ID: 39009085

    Bulevirtide reduced HDV RNA and ALT in chronic hepatitis delta — clear liver enzyme improvement.

  36. Serum Transaminases and Older Adults: Distribution and Associations With All-Cause Mortality

    PubMed ID: 39158565

    Large cohort: ALT (alanine aminotransferase) levels strongly associated with all‑cause mortality — direct clinical relevance to liver/alanine biology.

  37. Prophylactic terlipressin infusion for severe postreperfusion syndrome in patients undergoing deceased donor liver transplantation: the TIPS-DDLT randomized controlled trial

    PubMed ID: 37161582

    Prophylactic terlipressin during transplant reduced peak ALT and clinical postreperfusion syndrome — direct reduction in liver injury markers.

  38. Preoperative dexamethasone administration in hepatectomy of 25-min intermittent Pringle's maneuver for hepatocellular carcinoma: a randomized controlled trial

    PubMed ID: 37526089

    Perioperative dexamethasone reduced integrated postoperative ALT/AST exposure (AUC) and inflammatory markers after hepatectomy — direct liver enzyme benefit.

  39. Lifestyle Optimization Leads to Superior Liver Regeneration in Live Liver Donors and Decreases Early Allograft Dysfunction in Recipients: A Randomized Control Trial

    PubMed ID: 36912445

    Pre‑donation lifestyle intervention lowered perioperative ALT/AST peaks and improved graft regeneration — clinically relevant liver outcomes.

  40. Clinical efficacy of ulinastatin in the treatment of unliquefied pyogenic liver abscess complicated by septic shock: A randomized controlled trial

    PubMed ID: 37102655

    Ulinastatin RCT in septic liver abscess reduced ALT/AST and sped recovery — direct improvement in liver enzyme markers.

  41. A randomized placebo-controlled, double-blind study to investigate the effect of a high oral loading dose of cholecalciferol in non-alcoholic fatty liver disease patients, new insights on serum STAT-3 and hepassocin

    PubMed ID: 37667938

    High‑dose vitamin D reduced liver enzymes and inflammation in NAFLD — moderate‑strong liver benefit (not alanine supplement).

  42. Dietary approaches to stop hypertension (DASH) diet improves hepatic fibrosis, steatosis and liver enzymes in patients with non-alcoholic fatty liver disease: a randomized controlled trial

    PubMed ID: 37855891

    DASH diet RCT produced significant reductions in hepatic steatosis/fibrosis and ALT — reasonably direct liver‑support evidence (dietary intervention).

  43. Licogliflozin for nonalcoholic steatohepatitis: a randomized, double-blind, placebo-controlled, phase 2a study

    PubMed ID: 35725922

    Licogliflozin 150 mg produced large, significant ALT reductions and liver‑fat decreases in NASH patients — strong liver‑function signal.

  44. LLF580, an FGF21 Analog, Reduces Triglycerides and Hepatic Fat in Obese Adults With Modest Hypertriglyceridemia

    PubMed ID: 34431493

    FGF21 analogue markedly reduced liver fat fraction and improved lipid markers; strong hepatic benefit.

  45. Fenofibrate in primary sclerosing cholangitis; a randomized, double-blind, placebo-controlled trial

    PubMed ID: 35822553

    Fenofibrate in PSC markedly lowered ALP and ALT — strong liver‑enzyme results (small sample but large % changes).

  46. Efficacy and safety of bicyclol for treating patients with idiosyncratic acute drug-induced liver injury: A multicenter, randomized, phase II trial

    PubMed ID: 35567757

    Bicyclol markedly accelerated ALT decline in DILI — strong liver enzyme improvement (drug intervention).

  47. Efficacy of omega-3-rich Camelina sativa on the metabolic and clinical markers in nonalcoholic fatty liver disease: a randomized, controlled trial

    PubMed ID: 35421019

    Camelina sativa oil trial improved ALT and other liver/metabolic markers in NAFLD — direct liver benefit evidence.

  48. Fibroblast growth factor receptor 1/Klothoβ agonist BFKB8488A improves lipids and liver health markers in patients with diabetes or NAFLD: A phase 1b randomized trial

    PubMed ID: 35993161

    FGFR1/KLB agonist produced dose‑dependent, substantial liver‑fat reductions and improved liver enzymes in NAFLD subgroup.

  49. A Freshwater Fish-Based Diet Alleviates Liver Steatosis by Modulating Gut Microbiota and Metabolites: A Clinical Randomized Controlled Trial in Chinese Participants With Nonalcoholic Fatty Liver Disease

    PubMed ID: 35973188

    Freshwater‑fish diet RCT produced substantial liver‑fat and ALT/GGT improvements in NAFLD — directly relevant to liver function outcomes.

  50. Safety, Tolerability, and Biologic Activity of AXA1125 and AXA1957 in Subjects With Nonalcoholic Fatty Liver Disease

    PubMed ID: 34382947

    AXA1125 (amino‑acid combination) reduced liver fat (MRI‑PDFF) and improved ALT/HOMA‑IR—direct hepatic benefit from amino‑acid therapy.

  51. Randomised clinical trial: Pemafibrate, a novel selective peroxisome proliferator-activated receptor α modulator (SPPARMα), versus placebo in patients with non-alcoholic fatty liver disease

    PubMed ID: 34528723

    Pemafibrate in NAFLD lowered ALT and liver stiffness—strong liver‑direct evidence (drug, not alanine).

  52. Antioxidant Activity with Increased Endogenous Levels of Vitamin C, E and A Following Dietary Supplementation with a Combination of Glutathione and Resveratrol Precursors

    PubMed ID: 33105552

    Alanine‑containing glutathione‑precursor supplements increased erythrocyte GSH and antioxidant vitamins—mechanistically relevant to hepatic antioxidant capacity and liver health (small study, surrogate endpoints).

  53. The Effect of Zinc Supplementation on Steatosis Severity and Liver Function Enzymes in Overweight/Obese Patients with Mild to Moderate Non-alcoholic Fatty Liver Following Calorie-Restricted Diet: a Double-Blind, Randomized Placebo-Controlled Trial

    PubMed ID: 32020523

    Zinc + calorie restriction modestly lowered ALT and waist size in NAFLD — direct liver enzyme improvement.

  54. Effect of a high monounsaturated vs high polyunsaturated fat hypocaloric diets in nonalcoholic fatty liver disease

    PubMed ID: 24763885

    Hypocaloric diets reduced ALT, AST and GGT in obese NAFLD patients — robust human liver enzyme improvements.

  55. Reduced hepatotoxicity by total glucosides of paeony in combination treatment with leflunomide and methotrexate for patients with active rheumatoid arthritis

    PubMed ID: 23415907

    Total glucosides of paeony markedly reduced ALT/AST‑defined hepatotoxicity—direct hepatoprotective evidence (ALT is alanine aminotransferase).

  56. [Observation on therapeutic effect of acupuncture for treatment of patients with nonalcoholic steatohepatitis]

    PubMed ID: 19947262

    Acupuncture trial in NASH produced ALT and lipid improvements—direct liver disease relevance.

  57. Sixty-two cases of intractable ascites due to cirrhosis treated by the modified Wulingsan power plus abdominal reinfusion of the concentrated ascites after ultrafiltration

    PubMed ID: 19663098

    Herbal powder plus abdominal reinfusion improved LFTs in ascites patients—relevant to liver function in advanced disease.

  58. [Results of 3 years of continuous entecavir treatment in nucleos(t)ide-naive chronic hepatitis B patients]

    PubMed ID: 20038326

    Long-term entecavir produced sustained viral suppression and high rates of ALT normalization—strong liver disease outcome relevance.

  59. Early hepatitis B virus DNA reduction in hepatitis B e antigen-positive patients with chronic hepatitis B: A randomized international study of entecavir versus adefovir

    PubMed ID: 19065670

    Entecavir vs adefovir trial reported ALT normalization along with potent viral suppression—high liver-specific relevance.

Metabolism (40)
  1. Impact of insulin sensitivity treatment with pioglitazone on endothelial function in non-diabetic patients with arterial hypertension

    PubMed ID: 19473593

    Pioglitazone improved insulin sensitivity and metabolic markers, directly relevant to metabolic balance.

  2. The effect of L-alanyl-L-glutamine dipeptide supplemented total parenteral nutrition on infectious morbidity and insulin sensitivity in critically ill patients

    PubMed ID: 21336131

    Alanyl‑glutamine decreased infection rates and insulin requirements and modestly improved glycemia — indicates metabolic stabilization in critically ill patients.

  3. Metabolic profiles characterizing different phenotypes of polycystic ovary syndrome: plasma metabolomics analysis

    PubMed ID: 23198915

    PCOS metabolomics showed consistent alanine alterations across phenotypes, indicating alanine is involved in systemic metabolic balance (observational).

  4. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Alanine contributes to gluconeogenesis and nitrogen balance; dipeptide intervention improved perioperative metabolic/biomarker outcomes.

  5. Fenofibrate lowers atypical sphingolipids in plasma of dyslipidemic patients: A novel approach for treating diabetic neuropathy?

    PubMed ID: 26228675

    Fenofibrate lowered neurotoxic 1‑deoxy‑sphingolipids that arise from alanine utilization by SPT—this suggests modulation of an alanine-linked metabolic pathway contributing to metabolic balance.

  6. Oral supplementation with L-glutamine alters gut microbiota of obese and overweight adults: A pilot study

    PubMed ID: 25933498

    30 g/day L‑alanine caused a measurable change in gut microbiota F/B ratio — microbiota changes often modulate metabolic homeostasis.

  7. Weight-loss diets and 2-y changes in circulating amino acids in 2 randomized intervention trials

    PubMed ID: 26791187

    Large dietary trials linked reductions in plasma alanine and other AAs to improved insulin resistance and metabolic markers (observational/interventional diet context).

  8. Effect of metformin therapy on circulating amino acids in a randomized trial: the CAMERA study

    PubMed ID: 26887663

    Metformin produced sustained, specific increases in plasma alanine and changes in other AAs — evidence of altered systemic metabolic balance involving alanine.

  9. [Plasma metabonomics of Guifu Dihuang Wan in the treatment of yang deficiency]

    PubMed ID: 27881338

    Plasma metabolomics showed increased alanine and other metabolites after the intervention indicating shifts in metabolic balance.

  10. Supplementing an energy adequate, higher protein diet with protein does not enhance fat-free mass restoration after short-term severe negative energy balance

    PubMed ID: 28385919

    Tracer study during energy deficit/refeeding informs alanine's role in whole‑body metabolic recovery and protein/energy balance.

  11. Effects of liraglutide, metformin and gliclazide on body composition in patients with both type 2 diabetes and non-alcoholic fatty liver disease: A randomized trial

    PubMed ID: 29957886

    Liraglutide/metformin RCT showed metabolic improvements including ALT and fat mass — relevant to metabolic balance context though not alanine supplementation.

  12. Circulating amino acids and the risk of macrovascular, microvascular and mortality outcomes in individuals with type 2 diabetes: results from the ADVANCE trial

    PubMed ID: 29728717

    Large observational cohort found higher alanine associated with lower microvascular risk and favorable metabolic associations in diabetes.

  13. Are dietary amino acids prospectively predicts changes in serum lipid profile?

    PubMed ID: 31235103

    Large prospective cohort found dietary alanine intake associated with small increases in triglycerides and LDL-C, showing alanine intake can affect metabolic/lipid balance (observational; direction may be adverse).

  14. Metabolic Trajectories Following Contrasting Prudent and Western Diets from Food Provisions: Identifying Robust Biomarkers of Short-Term Changes in Habitual Diet

    PubMed ID: 31600930

    Plasma and urine metabolomics showed alanine levels vary with dietary pattern, indicating alanine involvement in systemic metabolic balance.

  15. Glycolysis/gluconeogenesis- and tricarboxylic acid cycle-related metabolites, Mediterranean diet, and type 2 diabetes

    PubMed ID: 32060497

    Strong observational evidence that higher plasma alanine associates with insulin resistance and incident T2D, implicating alanine in broader metabolic balance (associative, not intervention).

  16. Safety, Tolerability, and Biologic Activity of AXA1125 and AXA1957 in Subjects With Nonalcoholic Fatty Liver Disease

    PubMed ID: 34382947

    AXA1125 (amino‑acid combination) reduced liver fat and improved HOMA‑IR—direct metabolic balance evidence.

  17. The carbon isotope ratios of nonessential amino acids identify sugar-sweetened beverage (SSB) consumers in a 12-wk inpatient feeding study of 32 men with varying SSB and meat exposures

    PubMed ID: 33676366

    Alanine carbon isotope ratio tracked added‑sugar intake and indicated systemic metabolic changes — supports a role in metabolic balance (biomarker/physiology).

  18. Effect of Lactobacillus plantarum LMT1-48 on Body Fat in Overweight Subjects: A Randomized, Double-Blind, Placebo-Controlled Trial

    PubMed ID: 35487505

    L. plantarum reduced visceral fat, ALT and HOMA‑IR — clear metabolic‑balance benefits relevant to alanine's metabolic context.

  19. LLF580, an FGF21 Analog, Reduces Triglycerides and Hepatic Fat in Obese Adults With Modest Hypertriglyceridemia

    PubMed ID: 34431493

    FGF21 analog produced large, clinically meaningful improvements in triglycerides, liver fat and HDL — strong metabolic‑balance effect.

  20. Licogliflozin for nonalcoholic steatohepatitis: a randomized, double-blind, placebo-controlled, phase 2a study

    PubMed ID: 35725922

    Licogliflozin reduced liver fat, ALT and body weight — favorable metabolic effects in NASH patients.

  21. A randomized Phase I study of the safety, tolerability, pharmacokinetics and pharmacodynamics of BI 456906, a dual glucagon receptor/glucagon-like peptide-1 receptor agonist, in healthy Japanese men with overweight/obesity

    PubMed ID: 36974349

    Dual GCGR/GLP‑1 agonist induced substantial weight loss and decreased plasma alanine — strong metabolic effect, but drug‑mediated not alanine supplementation.

  22. Impact of pemafibrate on lipid profile and insulin resistance in hypertriglyceridemic patients with coronary artery disease and metabolic syndrome

    PubMed ID: 38393377

    Pemafibrate substantially improved TG and lowered ALT/GGT in MetS patients — meaningful metabolic improvements (indirect to alanine).

  23. Effect of a low-volume exercise intervention on the plasma lipidome in people with normal glucose, prediabetes or type 2 diabetes: a randomized controlled trial

    PubMed ID: 41021739

    Strong evidence: plasma alanine elevated in T2D and associated with harmful lipids; exercise reduced adverse metabolites — directly ties alanine to metabolic balance.

  24. Effect of consumption of anthocyanin-rich products on NMR lipoprotein subclasses and biomarkers in hypercholesterolemic subjects: a randomized controlled trial (the AppleCOR study)

    PubMed ID: 39950742

    Dietary anthocyanins improved lipid/inflammatory markers and decreased circulating alanine, supporting diet‑alanine–metabolism links.

  25. The effects of ellagic acid in metabolic dysfunction-associated steatotic liver disease (MASLD) patients: a randomized, add-on, double-blind, controlled trial

    PubMed ID: 40877731

    Ellagic acid plus hypocaloric diet reduced hepatic fat, stiffness and ALT — direct metabolic improvements in MASLD patients.

  26. Alteration in Amino Acid Metabolism After Isocaloric, Energy-Restricted Ketogenic Diet in Women with Overweight and Obesity: Randomized KETO-MINOX Trial

    PubMed ID: 41599913

    Direct measurement of serum alanine and BCAAs in a dietary intervention — strongly informative about alanine's role in metabolic amino-acid balance.

  27. Short-term restorative nutrition in malnourished patients: pro's and con's of intravenous and enteral alimentation using compositionally matched nutrients

    PubMed ID: 9372379

    Amino‑acid nutrition achieved faster metabolic/nitrogen equilibrium vs alternatives, supporting systemic metabolic balance.

  28. Nitrogen balance, 3-methylhistidine excretion, and plasma amino acid profile in infants after cardiac operations for congenital heart defects: the effect of early nutritional support

    PubMed ID: 9434700

    Parenteral amino‑acid support improved nitrogen balance and biochemical markers after major stress, indicating contribution to metabolic stabilization.

  29. Alanine- and glucose-based hypo-osmolar oral rehydration solution in infants with persistent diarrhoea: a controlled trial

    PubMed ID: 7549296

    Randomized trial showed clinically meaningful reduction in stool output with an L‑alanine+glucose ORS, indicating benefit for fluid/electrolyte and metabolic balance in diarrheal infants.

  30. Ursodeoxycholic acid for the treatment of primary biliary cirrhosis. Interim analysis of a double-blind multicentre randomized trial. The UDCA-PBC Study Group

    PubMed ID: 1975819

    UDCA trial changed liver enzymes and bile acid metabolism in cholestatic disease — systemic metabolic improvements though not alanine supplementation.

  31. Serum metabolite profiling yields insights into health promoting effect of A. muciniphila in human volunteers with a metabolic syndrome

    PubMed ID: 34812127

    Direct metabolic intervention lowered plasma alanine and shifted metabolism toward ketogenesis and higher acylcarnitines.

  32. The effects of short-term parenteral nutrition on human liver protein and amino acid metabolism during laparoscopic surgery

    PubMed ID: 9406129

    Demonstrated increases in hepatic free alanine under TPN — consistent with an active role of alanine in systemic metabolic balance (gluconeogenesis/amino-acid pool).

  33. Metadoxine accelerates fatty liver recovery in alcoholic patients: results of a randomized double-blind, placebo-control trial. Spanish Group for the Study of Alcoholic Fatty Liver

    PubMed ID: 9537864

    Metadoxine randomized trial produced clear improvement in liver enzymes and steatosis — directly relevant to metabolic/liver balance (though not an alanine supplement).

  34. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    Improved nitrogen balance and albumin suggest beneficial metabolic effects in catabolic postoperative patients.

  35. Changes in myocardial free amino acids during pediatric cardiac surgery: a randomised controlled trial of three cardioplegic techniques

    PubMed ID: 16723246

    Direct myocardial alanine observations reflect shifts in local metabolic balance and alanine's role in metabolic recovery.

  36. Evaluation of metabolite profiles as biomarkers for the pharmacological effects of thiazolidinediones in Type 2 diabetes mellitus patients and healthy volunteers

    PubMed ID: 17488363

    Direct metabolomics evidence of altered alanine and other amino acids after rosiglitazone indicates involvement in systemic metabolic balance.

  37. Mental and physical fatigue-related biochemical alterations

    PubMed ID: 18834718

    Exercise‑related alanine shifts indicate a role in systemic metabolic balance during/after exertion.

  38. Metabolic syndrome and alanine aminotransferase: a global perspective from the NAVIGATOR screening population

    PubMed ID: 20002471

    Large study linking ALT with metabolic syndrome components—strongly relevant to metabolic balance context.

  39. Efficacy and safety of switching from boosted lopinavir to boosted atazanavir in patients with virological suppression receiving a LPV/r-containing HAART: the ATAZIP study

    PubMed ID: 19390327

    Switching ART (lopinavir→atazanavir) produced substantial triglyceride improvements—relevant to metabolic profile.

  40. [Observation on therapeutic effect of acupuncture for treatment of patients with nonalcoholic steatohepatitis]

    PubMed ID: 19947262

    Acupuncture trial in NASH documented improvements in liver enzymes and lipids—relevant to metabolic balance (non-pharmacologic intervention).

Blood sugar (22)
  1. Evaluation of metabolite profiles as biomarkers for the pharmacological effects of thiazolidinediones in Type 2 diabetes mellitus patients and healthy volunteers

    PubMed ID: 17488363

    Rosiglitazone produced rapid changes in plasma alanine in T2DM patients, linking alanine metabolism to drug-mediated improvements in insulin sensitivity (strongest indirect metabolic link).

  2. Circulating amino acids and the risk of macrovascular, microvascular and mortality outcomes in individuals with type 2 diabetes: results from the ADVANCE trial

    PubMed ID: 29728717

    Large cohort: higher baseline alanine associated with lower microvascular risk in T2DM and relates to metabolic/glucose pathways (observational).

  3. Effects of liraglutide, metformin and gliclazide on body composition in patients with both type 2 diabetes and non-alcoholic fatty liver disease: A randomized trial

    PubMed ID: 29957886

    Liraglutide/metformin RCT in T2DM with NAFLD produced substantial weight and glycemic improvements — relevant to glucose balance in clinical settings, but not alanine supplementation.

  4. Effect of metformin therapy on circulating amino acids in a randomized trial: the CAMERA study

    PubMed ID: 26887663

    Metformin raised plasma alanine and altered aromatic amino acids independent of weight/IR, linking alanine shifts to glucose‑related metabolic effects.

  5. Weight-loss diets and 2-y changes in circulating amino acids in 2 randomized intervention trials

    PubMed ID: 26791187

    Large diet trials showed reductions in plasma alanine associated with improved insulin resistance and glycaemic measures (associative evidence).

  6. The effect of chromium on inflammatory markers, 1st and 2nd phase insulin secretion in type 2 diabetes

    PubMed ID: 23494740

    Chromium chloride improved insulin sensitivity and insulin responsivity in type 2 diabetes — directly relevant to glucose balance (not alanine).

  7. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Alanine is gluconeogenic; dipeptide infusion supplies alanine which can support glucose availability in stress states.

  8. Metabolic profiles characterizing different phenotypes of polycystic ovary syndrome: plasma metabolomics analysis

    PubMed ID: 23198915

    Large metabolomics study: higher alanine accompanied phenotype‑specific lower glucose in PCOS, suggesting alanine links to glucose metabolism (observational).

  9. The effect of L-alanyl-L-glutamine dipeptide supplemented total parenteral nutrition on infectious morbidity and insulin sensitivity in critically ill patients

    PubMed ID: 21336131

    Alanyl‑glutamine supplementation in TPN reduced insulin requirements for comparable glycemia and modestly lowered mean plasmatic glycemia.

  10. Impact of insulin sensitivity treatment with pioglitazone on endothelial function in non-diabetic patients with arterial hypertension

    PubMed ID: 19473593

    Pioglitazone trial showed clear improvements in insulin sensitivity—directly relevant to glucose balance (no alanine tested).

  11. Metabolic syndrome and alanine aminotransferase: a global perspective from the NAVIGATOR screening population

    PubMed ID: 20002471

    Large epidemiologic analysis showing ALT clusters with fasting glucose and metabolic syndrome components; relevant to glucose/metabolic context.

  12. Effects of pioglitazone on metabolic control and blood pressure: a randomised study in patients with type 2 diabetes mellitus

    PubMed ID: 14594526

    Pioglitazone produced clear improvements in HbA1c and metabolic parameters — directly relevant to glucose balance (drug therapy, not alanine).

  13. Association of the Pro12Ala polymorphism in the PPAR-gamma2 gene with 3-year incidence of type 2 diabetes and body weight change in the Finnish Diabetes Prevention Study

    PubMed ID: 12145174

    PPAR-γ Ala12 variant associated with altered diabetes risk—direct link between an alanine substitution and glucose regulation.

  14. The effects of short-term parenteral nutrition on human liver protein and amino acid metabolism during laparoscopic surgery

    PubMed ID: 9406129

    Increased free hepatic alanine (gluconeogenic substrate) during TPN suggests a role in maintaining glucose via gluconeogenesis.

  15. Serum metabolite profiling yields insights into health promoting effect of A. muciniphila in human volunteers with a metabolic syndrome

    PubMed ID: 34812127

    Akkermansia lowered plasma alanine and shifted metabolic profile toward ketogenesis — pertinent to glucose/energy metabolism.

  16. Effects of reduced sedentary time on cardiometabolic health in adults with metabolic syndrome: A three-month randomized controlled trial

    PubMed ID: 35487860

    Reducing sedentary time improved fasting insulin — direct metabolic/insulin effect relevant to glucose balance.

  17. Licogliflozin for nonalcoholic steatohepatitis: a randomized, double-blind, placebo-controlled, phase 2a study

    PubMed ID: 35725922

    Licogliflozin (SGLT1/2 inhibitor) produced robust body‑weight and liver‑fat reductions and lowered ALT — drug improved metabolic/glucose‑related outcomes.

  18. Effect of a low-volume exercise intervention on the plasma lipidome in people with normal glucose, prediabetes or type 2 diabetes: a randomized controlled trial

    PubMed ID: 41021739

    Direct associations reported between l‑alanine (and d‑alanine) and fasting glucose/HOMA‑IR; exercise reduced related harmful lipids in T2D.

  19. Alteration in Amino Acid Metabolism After Isocaloric, Energy-Restricted Ketogenic Diet in Women with Overweight and Obesity: Randomized KETO-MINOX Trial

    PubMed ID: 41599913

    Direct measurement of serum alanine decreases on a ketogenic diet — highlights alanine's role in glucose/ amino-acid metabolism (gluconeogenic substrate); fairly relevant.

  20. The carbon isotope ratios of nonessential amino acids identify sugar-sweetened beverage (SSB) consumers in a 12-wk inpatient feeding study of 32 men with varying SSB and meat exposures

    PubMed ID: 33676366

    Alanine carbon isotope ratio (CIRAla) was sensitive to sugar intake; alanine is a key gluconeogenic precursor, so this supports a role in glucose metabolism (biomarker + physiology).

  21. Safety, Tolerability, and Biologic Activity of AXA1125 and AXA1957 in Subjects With Nonalcoholic Fatty Liver Disease

    PubMed ID: 34382947

    AXA1125 (multi‑AA) improved HOMA‑IR and liver fat—direct evidence for glucose/insulin effects from amino‑acid therapy.

  22. Glycolysis/gluconeogenesis- and tricarboxylic acid cycle-related metabolites, Mediterranean diet, and type 2 diabetes

    PubMed ID: 32060497

    Large metabolomics cohort: higher circulating alanine strongly predicted future type 2 diabetes and correlated with higher insulin resistance (HOMA‑IR) — a robust association relevant to glucose balance (observational; does not prove supplementation effect).

Protein source (45)
  1. L-alanin-L-glutamine supplementation improves the outcome after colorectal surgery for cancer

    PubMed ID: 17573745

    L-alanyl–L-glutamine infusion directly supplies alanine (and glutamine), delivering amino acid building blocks used in tissue repair and recovery.

  2. Hypermetabolism and increased peripheral release of amino acids after subarachnoidal hemorrhage and its operative treatment

    PubMed ID: 8875516

    Alanyl‑glutamine infusion directly supplies alanine (and glutamine) as amino‑acid building blocks and raised circulating glutamine.

  3. Nitrogen balance, 3-methylhistidine excretion, and plasma amino acid profile in infants after cardiac operations for congenital heart defects: the effect of early nutritional support

    PubMed ID: 9434700

    Parenteral amino acids preserved plasma alanine and improved nitrogen balance—direct evidence that supplied amino acids serve as building blocks post‑surgery.

  4. Short-term restorative nutrition in malnourished patients: pro's and con's of intravenous and enteral alimentation using compositionally matched nutrients

    PubMed ID: 9372379

    Comparative amino‑acid feeding restored/prevented depletion of amino‑acid pools and improved nutritional markers—supports the role of amino acids as substrates for synthesis.

  5. [Effect of alanyl-glutamine in postoperative total parenteral nutrition on postoperative immunosuppression and morbidity. Preliminary results of a prospective randomized study]

    PubMed ID: 9931687

    Alanyl‑glutamine is an amino‑acid source in TPN with demonstrated clinical benefits — direct support as a building block supply.

  6. Major liver resection results in a changed plasma amino acid pattern as reflected by a decreased Fischer ratio which improves by bactericidal/permeability increasing protein

    PubMed ID: 11169074

    Demonstrates large mobilization of alanine after tissue stress—consistent with its role as an available amino‑acid building block during recovery.

  7. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    The intervention was L‑alanyl‑L‑glutamine — directly supplies alanine (and glutamine) as amino‑acid building blocks.

  8. Dietary treatment of rheumatoid cachexia with beta-hydroxy-beta-methylbutyrate, glutamine and arginine: a randomised controlled trial

    PubMed ID: 15896432

    Alanine-containing placebo increased total body protein and lean mass in cachectic patients — supports provision of amino-acid substrate for protein synthesis.

  9. Usefulness of granular BCAA after hepatectomy for liver cancer complicated with liver cirrhosis

    PubMed ID: 15811769

    BCAA granules are amino-acid supplements that supported albumin recovery after surgery — demonstrates that amino-acid supplementation can supply building blocks (not alanine-specific).

  10. Changes in myocardial free amino acids during pediatric cardiac surgery: a randomised controlled trial of three cardioplegic techniques

    PubMed ID: 16723246

    Measured tissue free alanine — direct evidence that alanine is present in tissues and available as an amino‑acid building block.

  11. [Effects of parenteral glutamine in patients submitted to bone marrow transplantation]

    PubMed ID: 16562807

    Alanyl‑glutamine PN directly supplies alanine (and glutamine) — the clearest direct evidence that alanine can be delivered therapeutically, despite lack of clinical effect in this trial.

  12. Effect of dipeptide of glutamine and alanine on severe traumatic brain injury

    PubMed ID: 17535636

    Glutamine–alanine dipeptide provided alanine as part of parenteral nutrition in severe TBI, supplying fundamental amino acid substrates.

  13. [Impact of intravenous nutrition on plasma free amino acid spectrum and immune function for patients with sepsis]

    PubMed ID: 17571315

    IV amino‑acid nutrition directly supplies alanine and other AAs—strong evidence that supplementation provides building blocks for protein synthesis.

  14. Perioperative intravenous glutamine supplemetation in major abdominal surgery for cancer: a randomized multicenter trial

    PubMed ID: 19801932

    Direct study of IV L‑alanine–L‑glutamine dipeptide — directly supplies alanine (and glutamine) as amino-acid building blocks.

  15. Effects of glutamine supplementation on patients undergoing abdominal surgery

    PubMed ID: 19382426

    Glutamine-enriched TPN preserved GSH/albumin post-op — demonstrates provision of key amino acids in nutrition support (alanine not primary but related).

  16. Cytokine responses in very low birth weight infants receiving glutamine-enriched enteral nutrition

    PubMed ID: 19172131

    Alanine was administered as an isonitrogenous comparator in neonatal enteral supplementation—direct link to alanine as an amino-acid input.

  17. Evaluation of the antiobesity effects of an amino acid mixture and conjugated linoleic acid on exercising healthy overweight humans: a randomized, double-blind, placebo-controlled trial

    PubMed ID: 20819421

    An amino-acid supplement that included alanine was administered peri-exercise and produced measurable anthropometric changes—strongest direct evidence that alanine was supplied as a building-block in humans within the dataset.

  18. The effect of L-alanyl-L-glutamine dipeptide supplemented total parenteral nutrition on infectious morbidity and insulin sensitivity in critically ill patients

    PubMed ID: 21336131

    Alanyl‑glutamine supplies alanine (and glutamine) directly as parenteral amino acid substrates, supporting the role of alanine as a building block.

  19. Glutamine-enriched nutrition does not reduce mucosal morbidity or complications after stem-cell transplantation for childhood malignancies: a prospective randomized study

    PubMed ID: 21499196

    Direct: intervention was alanyl‑glutamine (alanine‑containing dipeptide) administered IV — clearly provides alanine moiety as building block, even though clinical endpoints were negative.

  20. A double-blind controlled trial of a single dose naproxen and an amino acid medical food theramine for the treatment of low back pain

    PubMed ID: 20861716

    Theramine is explicitly an amino‑acid medical food and therefore directly supplies amino acid substrates (strongest direct evidence among listed studies for amino‑acid provision).

  21. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Direct administration of L‑alanine (as alanine–glutamine dipeptide) supplies amino‑acid substrates for synthesis.

  22. Influence of training status on high-intensity intermittent performance in response to β-alanine supplementation

    PubMed ID: 24500111

    β-alanine is an amino acid supplement; while it is a different isomer from L‑alanine, it is an amino‑acid building block and relevant to that benefit.

  23. Oral supplementation with L-glutamine alters gut microbiota of obese and overweight adults: A pilot study

    PubMed ID: 25933498

    30 g/day L‑alanine supplement was administered as a control and changed gut microbiota — direct human exposure to L‑alanine demonstrating systemic availability.

  24. Effect of metformin therapy on circulating amino acids in a randomized trial: the CAMERA study

    PubMed ID: 26887663

    Metformin produced a clear, sustained increase in plasma alanine — direct evidence about systemic alanine availability (relevant to 'providing' alanine pools).

  25. Comparison of Intradialytic Parenteral Nutrition with Glucose or Amino Acid Mixtures in Maintenance Hemodialysis Patients

    PubMed ID: 27271658

    Directly measured serum alanine changes with nutritional infusions during dialysis — strong direct evidence of how interventions alter alanine availability.

  26. [Plasma metabonomics of Guifu Dihuang Wan in the treatment of yang deficiency]

    PubMed ID: 27881338

    Plasma alanine significantly increased after the intervention (direct evidence of elevated alanine pool).

  27. Comparison of Two β-Alanine Dosing Protocols on Muscle Carnosine Elevations

    PubMed ID: 28910200

    β-alanine is an amino acid used for carnosine synthesis—direct evidence that supplementation provides substrate for molecular building (carnosine).

  28. Effect of the route of nutrition and L-alanyl-L-glutamine supplementation in amino acids' concentration in trauma patients

    PubMed ID: 28980034

    Direct clinical supplementation with L‑alanyl‑L‑glutamine increased plasma alanine/glutamine — strong direct evidence that alanine is supplied as a building block.

  29. Supplementing an energy adequate, higher protein diet with protein does not enhance fat-free mass restoration after short-term severe negative energy balance

    PubMed ID: 28385919

    Tracer study directly addresses alanine flux into whole‑body amino acid/protein pools — supports role as building block.

  30. Association of skeletal muscle and serum metabolites with maximum power output gains in response to continuous endurance or high-intensity interval training programs: The TIMES study - A randomized controlled trial

    PubMed ID: 30742692

    Direct measurement of skeletal muscle alanine indicates availability of alanine as an amino-acid substrate in muscle; evidence is observational.

  31. Antioxidant Activity with Increased Endogenous Levels of Vitamin C, E and A Following Dietary Supplementation with a Combination of Glutathione and Resveratrol Precursors

    PubMed ID: 33105552

    Alanine was a component of glutathione precursor supplements that led to increased cellular GSH and vitamin levels—demonstrates alanine's utility within supplemental amino‑acid formulations.

  32. [Effects of ulinastatin combined with glutamine on early hemodynamics in patients with severe burns]

    PubMed ID: 32114728

    Study administered alanine–glutamine dipeptide, directly supplying amino-acid substrates in critically ill burn patients.

  33. Modulation of the gut microbiota by probiotics and symbiotics is associated with changes in serum metabolite profile related to a decrease in inflammation and overall benefits to metabolic health: a double-blind randomized controlled clinical trial in women with obesity

    PubMed ID: 33565558

    Direct measurement: serum alanine increased following symbiotic intervention — clear evidence of altered alanine availability (most directly relevant study in the dataset).

  34. High-intensity interval training and essential amino acid supplementation: Effects on muscle characteristics and whole-body protein turnover

    PubMed ID: 33369879

    Physiologically alanine is a nonessential amino acid and part of whole‑body protein turnover; the tracer study directly addresses amino acid flux and building‑block roles.

  35. Efficacy of 12 weeks oral beta-alanine supplementation in patients with chronic obstructive pulmonary disease: a double-blind, randomized, placebo-controlled trial

    PubMed ID: 35977911

    Beta‑alanine supplementation produced a robust +54% increase in muscle carnosine, directly demonstrating provision of amino‑acid building blocks for dipeptide synthesis.

  36. Effect of an enteral amino acid blend on muscle and gut functionality in critically ill patients: a proof-of-concept randomized controlled trial

    PubMed ID: 36397118

    Enteral amino‑acid supplement increased muscle volume and markers in ICU patients — shows amino acids can act as building blocks (although alanine reportedly not included in that specific mixture).

  37. Effects of Five Amino Acids (Serine, Alanine, Glutamate, Aspartate, and Tyrosine) on Mental Health in Healthy Office Workers: A Randomized, Double-Blind, Placebo-Controlled Exploratory Trial

    PubMed ID: 35684157

    Study administered a mixture that included alanine; by definition it provided amino acid substrates and showed some functional cognitive/motivational changes.

  38. Effect of probiotic supplementation on plasma metabolite profile after Roux-Y gastric bypass: a prospective, randomized, double-blind, placebo-controlled clinical trial

    PubMed ID: 35987956

    Direct measurement of plasma alanine — highest direct link to the pool of amino‑acid building blocks.

  39. The relationship between neurotransmission-related amino acid blood concentrations and neuropsychological performance following acute exercise

    PubMed ID: 35227132

    Direct measurement of alanine increase after exercise demonstrates availability of alanine as an amino acid building block and metabolic substrate.

  40. Randomized Trial to Assess the Safety and Tolerability of Daily Intake of an Allulose Amino Acid-Based Hydration Beverage in Men and Women

    PubMed ID: 38892699

    Direct: the tested hydration powder explicitly contained L‑alanine and other amino acids — clear provision of amino‑acid building blocks (safety study only).

  41. A metabolic profile of xenon and metabolite associations with 6-month mortality after out-of-hospital cardiac arrest: A post-hoc study of the randomised Xe-Hypotheca trial

    PubMed ID: 38833442

    Measured circulating alanine (higher in non‑survivors) indicating shifts in free amino acid pools—relevant to amino acid availability.

  42. Impact of Distinct Antiandrogen Exposures on the Plasma Metabolome in Feminizing Gender-affirming Hormone Therapy

    PubMed ID: 38609170

    Clear longitudinal changes in alanine concentration indicate altered availability of alanine as a substrate for protein synthesis.

  43. Prognostic value of perioperative changes in serum primary metabolites in patients after major surgery under general anesthesia: an exploratory secondary analysis of the TAPIR trial

    PubMed ID: 40586833

    Perioperative metabolomics showed clinically meaningful decreases in serum alanine after major surgery — directly documents alanine as a measured amino‑acid substrate.

  44. Impact of Bifidobacterium animalis subsp. lactis BLa80 and Lacticaseibacillus rhamnosus LRa05 supplementation on the gut microbiota and metabolic health of alcohol-consuming individuals: a randomised, double-blind, placebo-controlled trial

    PubMed ID: 40527514

    Probiotic RCT increased certain SCFAs and altered amino‑acid handling postprandially — supports altered amino‑acid/substrate availability including alanine indirectly.

  45. Amino acid composition of plant protein-enriched wheat biscuits differentially affects postprandial amino acid responses of overweight/obese compared to normalweight subjects

    PubMed ID: 40690028

    Acute crossover study quantified postprandial alanine iAUC and found robust differences by weight, directly measuring alanine availability.

Energy & Fatigue (31)
  1. The relationship between neurotransmission-related amino acid blood concentrations and neuropsychological performance following acute exercise

    PubMed ID: 35227132

    Study directly correlated exercise‑induced increases in alanine (among other AA) with improved cognitive test performance, implying a brain energy/precursor role.

  2. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Perioperative L‑alanine–L‑glutamine dipeptide provides gluconeogenic alanine and improved hemodynamic/biomarker outcomes consistent with energy substrate support.

  3. Effect of two β-alanine dosing protocols on muscle carnosine synthesis and washout

    PubMed ID: 21847611

    Increases in muscle carnosine (H+ buffer) are strongly linked to reduced fatigue during high-intensity exercise.

  4. Six weeks of high-intensity interval training with and without beta-alanine supplementation for improving cardiovascular fitness in women

    PubMed ID: 20386120

    Beta-alanine is mechanistically linked to reduced muscle acidosis/fatigue; trial showed improved exercise capacity (supports reduced fatigue).

  5. Ketogenic diet is less effective in ameliorating depression and anxiety in obesity than Mediterranean diet: A pilot study for exploring the GUT-brain axis

    PubMed ID: 41197688

    Diet-associated microbiota changes increased brain alanine in mice and linked to behavioral effects, indicating alanine's association with brain metabolites/energy (indirect).

  6. Effect of a low-volume exercise intervention on the plasma lipidome in people with normal glucose, prediabetes or type 2 diabetes: a randomized controlled trial

    PubMed ID: 41021739

    Shows elevated plasma alanine in T2D and links to metabolic fuels; implies alanine involvement in systemic energy metabolism.

  7. Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial

    PubMed ID: 40010353

    Performance benefits with beta-alanine are mechanistically consistent with reduced neuromuscular/metabolic fatigue during high-intensity efforts.

  8. Impact of Distinct Antiandrogen Exposures on the Plasma Metabolome in Feminizing Gender-affirming Hormone Therapy

    PubMed ID: 38609170

    Longitudinal changes in plasma alanine with hormone therapy demonstrate systemic alanine pool shifts that can affect energy metabolism.

  9. Additive effects of beta-alanine and sodium bicarbonate on upper-body intermittent performance

    PubMed ID: 23595205

    Beta-alanine increased total work and performance in high‑intensity intermittent tasks, consistent with reduced perceived/performance fatigue.

  10. Oral nutritional supplement fortified with beta-alanine improves physical working capacity in older adults: a randomized, placebo-controlled study

    PubMed ID: 23832078

    Improvements in physical working capacity in older adults after beta‑alanine imply less functional fatigue.

  11. The effects of beta alanine plus creatine administration on performance during repeated bouts of supramaximal exercise in sedentary men

    PubMed ID: 25289715

    Improved repeated‑bout power output suggests delayed fatigue in high‑intensity exercise with β‑alanine+creatine.

  12. Influence of training status on high-intensity intermittent performance in response to β-alanine supplementation

    PubMed ID: 24500111

    Improved repeated‑effort performance implies reduced performance‑limiting fatigue (ergogenic benefit) with β‑alanine.

  13. Comparison of Intradialytic Parenteral Nutrition with Glucose or Amino Acid Mixtures in Maintenance Hemodialysis Patients

    PubMed ID: 27271658

    Intradialytic glucose infusion raised serum alanine and increased energy intake — indicates alanine links to metabolic/energy flux during nutrition support.

  14. Comparison of Two β-Alanine Dosing Protocols on Muscle Carnosine Elevations

    PubMed ID: 28910200

    β-alanine trials demonstrated increased carnosine and reductions in exercise fatigue—direct evidence for fatigue attenuation.

  15. Effect of the route of nutrition and L-alanyl-L-glutamine supplementation in amino acids' concentration in trauma patients

    PubMed ID: 28980034

    L‑alanyl‑L‑glutamine raised plasma alanine (substrate for gluconeogenesis) in trauma patients — plausible support for energy substrate/production (moderate direct evidence).

  16. Association of skeletal muscle and serum metabolites with maximum power output gains in response to continuous endurance or high-intensity interval training programs: The TIMES study - A randomized controlled trial

    PubMed ID: 30742692

    Baseline skeletal muscle alanine correlated moderately with gains in maximal power output after training (observational link to muscle energy metabolism).

  17. Supplementing an energy adequate, higher protein diet with protein does not enhance fat-free mass restoration after short-term severe negative energy balance

    PubMed ID: 28385919

    Used [15N]alanine tracer in studies of whole‑body protein turnover and refeeding after energy deficit — supports alanine's role in gluconeogenesis/energy supply.

  18. Role of β-Alanine Supplementation on Cognitive Function, Mood, and Physical Function in Older Adults; Double-Blind Randomized Controlled Study

    PubMed ID: 36839281

    Randomized trial of β‑alanine (2.4 g/day) in older adults improved MoCA and reduced depressive symptoms — direct human evidence of cognitive/mood benefits implicating brain effects.

  19. The Effect of Beta-Alanine versus Alkaline Agent Supplementation Combined with Branched-Chain Amino Acids and Creatine Malate in Highly-Trained Sprinters and Endurance Athletes: A Randomized Double-Blind Crossover Study

    PubMed ID: 31438535

    Combination including β-alanine lowered post‑exercise ammonia (a fatigue‑related marker) and was linked to performance benefits.

  20. Mental and physical fatigue-related biochemical alterations

    PubMed ID: 18834718

    Physical fatigue lowered plasma alanine — supports a role for alanine in exercise fatigue and recovery dynamics.

  21. Changes in myocardial free amino acids during pediatric cardiac surgery: a randomised controlled trial of three cardioplegic techniques

    PubMed ID: 16723246

    Measured myocardial free alanine rise after reperfusion — direct evidence alanine is available as metabolic substrate in myocardium.

  22. Effects of twenty-eight days of beta-alanine and creatine monohydrate supplementation on the physical working capacity at neuromuscular fatigue threshold

    PubMed ID: 17194255

    Beta‑alanine raised the neuromuscular fatigue threshold (direct evidence for reduced fatigue during exercise); relevance to L‑alanine is limited because this is beta‑alanine.

  23. Effects of 28 days of beta-alanine and creatine monohydrate supplementation on aerobic power, ventilatory and lactate thresholds, and time to exhaustion

    PubMed ID: 16953366

    Beta-alanine ± creatine showed within-group improvements in endurance/fatigue-related outcomes, supporting a moderate likelihood of fatigue reduction.

  24. Effect of creatine and beta-alanine supplementation on performance and endocrine responses in strength/power athletes

    PubMed ID: 17136944

    Beta‑alanine is often linked to reduced fatigue during high‑intensity exercise; the combined supplement trial showed better performance outcomes consistent with that role (but creatine co‑administered).

  25. D-alanine added to antipsychotics for the treatment of schizophrenia

    PubMed ID: 16154544

    D‑alanine adjunct improved schizophrenia symptoms (cognitive/negative domains included) — suggests central effects possibly via neurotransmitter/metabolic mechanisms tied to alanine, though not direct cerebral energy measurements.

  26. The effects of short-term parenteral nutrition on human liver protein and amino acid metabolism during laparoscopic surgery

    PubMed ID: 9406129

    Short-term TPN raised free hepatic alanine — direct evidence alanine increases hepatic substrate availability for gluconeogenesis/energy production.

  27. Serum metabolite profiling yields insights into health promoting effect of A. muciniphila in human volunteers with a metabolic syndrome

    PubMed ID: 34812127

    Akkermansia intervention shifted metabolism toward ketogenesis (energy substrate change) and reduced plasma alanine.

  28. A single administration of 'microbial' D-alanine to healthy volunteers augments reaction to negative emotions: A comparison with D-serine

    PubMed ID: 32167001

    Single oral D‑alanine accelerated recognition of negative facial emotions (acute CNS effect), suggesting central nervous system activity.

  29. Effects of a commercially available branched-chain amino acid-alanine-carbohydrate-based sports supplement on perceived exertion and performance in high intensity endurance cycling tests

    PubMed ID: 31959202

    Supplement reduced ratings of perceived exertion and improved ability to sustain training, compatible with reduced physical fatigue.

  30. High-intensity interval training and essential amino acid supplementation: Effects on muscle characteristics and whole-body protein turnover

    PubMed ID: 33369879

    Alanine was used as a 15N tracer in a HIIT+EAA trial to assess whole‑body protein turnover and muscle energy metabolism during/after exercise — supports role in gluconeogenesis/energy provision.

  31. Differential Metabolites and Metabolic Pathways Involved in Aerobic Exercise Improvement of Chronic Fatigue Symptoms in Adolescents Based on Gas Chromatography-Mass Spectrometry

    PubMed ID: 35206569

    Supervised aerobic exercise produced significant improvements in physical and mental fatigue scores in CFS adolescents.

Nutrition source (18)
  1. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    The trial reported improved nitrogen balance with L‑alanyl‑L‑glutamine, indicating a role in nitrogen handling/transport during catabolic stress.

  2. Major liver resection results in a changed plasma amino acid pattern as reflected by a decreased Fischer ratio which improves by bactericidal/permeability increasing protein

    PubMed ID: 11169074

    Marked post‑resection alanine increase correlated with hepatic dysfunction—consistent with alanine's known role transporting nitrogen from peripheral tissues to liver.

  3. The effects of short-term parenteral nutrition on human liver protein and amino acid metabolism during laparoscopic surgery

    PubMed ID: 9406129

    TPN increased hepatic alanine levels — supports alanine's metabolic role in the alanine cycle transporting nitrogen from muscle to liver.

  4. Short-term restorative nutrition in malnourished patients: pro's and con's of intravenous and enteral alimentation using compositionally matched nutrients

    PubMed ID: 9372379

    Comparative amino‑acid nutrition improved nitrogen equilibrium, supporting the role of supplied amino acids (including alanine) in systemic nitrogen handling.

  5. Nitrogen balance, 3-methylhistidine excretion, and plasma amino acid profile in infants after cardiac operations for congenital heart defects: the effect of early nutritional support

    PubMed ID: 9434700

    Parenteral amino acids produced better nitrogen balance and preserved plasma alanine, consistent with alanine’s physiological role in nitrogen shuttling (glucose–alanine cycle) in stressed infants.

  6. Changes in myocardial free amino acids during pediatric cardiac surgery: a randomised controlled trial of three cardioplegic techniques

    PubMed ID: 16723246

    Direct measurement of myocardial free alanine after reperfusion — alanine is a major nitrogen carrier (alanine cycle), so tissue changes support nitrogen transport role.

  7. Cytokine responses in very low birth weight infants receiving glutamine-enriched enteral nutrition

    PubMed ID: 19172131

    Alanine was used as an isonitrogenous placebo in neonatal nutrition, directly implicating its role as an amino-nitrogen carrier in study design.

  8. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Alanine is a primary carrier of nitrogen (alanine shuttle); the alanine–glutamine dipeptide directly supplies substrates for nitrogen transport.

  9. Comparison of Intradialytic Parenteral Nutrition with Glucose or Amino Acid Mixtures in Maintenance Hemodialysis Patients

    PubMed ID: 27271658

    Serum alanine changed with intradialytic interventions — supports alanine's role in carrying carbon/nitrogen between tissues (practical metabolic evidence).

  10. Effect of the route of nutrition and L-alanyl-L-glutamine supplementation in amino acids' concentration in trauma patients

    PubMed ID: 28980034

    L‑alanyl‑L‑glutamine supplementation elevated plasma alanine/glutamine/citrulline in trauma patients — directly supports the glucose–alanine cycle and nitrogen shuttling in clinical settings.

  11. Supplementing an energy adequate, higher protein diet with protein does not enhance fat-free mass restoration after short-term severe negative energy balance

    PubMed ID: 28385919

    Study used [15N]alanine tracer to measure whole‑body protein/nitrogen turnover — directly supports alanine's role in nitrogen transport (glucose‑alanine cycle).

  12. [Effects of ulinastatin combined with glutamine on early hemodynamics in patients with severe burns]

    PubMed ID: 32114728

    Study administered alanine–glutamine dipeptide (a nitrogen shuttle) in burn patients; this directly relates to supplying amino-nitrogen and supporting nitrogen transport/metabolism.

  13. High-intensity interval training and essential amino acid supplementation: Effects on muscle characteristics and whole-body protein turnover

    PubMed ID: 33369879

    Alanine used as a 15N tracer to assess whole‑body protein turnover — directly relevant to alanine's physiological role in carrying nitrogen from muscle to liver (alanine cycle).

  14. The relationship between neurotransmission-related amino acid blood concentrations and neuropsychological performance following acute exercise

    PubMed ID: 35227132

    Direct measurement: post‑exercise alanine rise supports its established role shuttling nitrogen from muscle to liver (glucose–alanine cycle).

  15. Effect of dipeptide of glutamine and alanine on severe traumatic brain injury

    PubMed ID: 17535636

    Alanine is a central amino acid in nitrogen shuttling (alanine cycle); glutamine–alanine dipeptide used in critical care likely assists nitrogen transport/metabolism in ill patients (indirect evidence).

  16. [Impact of intravenous nutrition on plasma free amino acid spectrum and immune function for patients with sepsis]

    PubMed ID: 17571315

    IV amino‑acid nutrition in septic patients directly changed plasma free amino acids (including alanine), reflecting impacts on amino‑nitrogen pools and transport.

  17. Mental and physical fatigue-related biochemical alterations

    PubMed ID: 18834718

    Plasma alanine decline after exercise supports alanine's role transporting amino‑nitrogen from muscle to liver (glucose‑alanine cycle).

  18. Perioperative intravenous glutamine supplemetation in major abdominal surgery for cancer: a randomized multicenter trial

    PubMed ID: 19801932

    L‑alanine–L‑glutamine dipeptide is used clinically to deliver amino-nitrogen; alanine functions in nitrogen shuttling (alanine cycle).

Muscle growth (16)
  1. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Providing alanine (with glutamine) supplies amino‑acid substrate that can be used for protein synthesis in stressed patients.

  2. Nitrogen balance, 3-methylhistidine excretion, and plasma amino acid profile in infants after cardiac operations for congenital heart defects: the effect of early nutritional support

    PubMed ID: 9434700

    Parenteral amino acids improved nitrogen balance and reduced markers of proteolysis after surgery—supports net protein anabolism when amino acids are supplied.

  3. Short-term restorative nutrition in malnourished patients: pro's and con's of intravenous and enteral alimentation using compositionally matched nutrients

    PubMed ID: 9372379

    IV/enteral amino‑acid feeding led to faster nitrogen equilibrium and improved nutritional markers, consistent with enhanced protein synthesis potential.

  4. [Effect of alanyl-glutamine in postoperative total parenteral nutrition on postoperative immunosuppression and morbidity. Preliminary results of a prospective randomized study]

    PubMed ID: 9931687

    Alanyl‑glutamine in TPN improved immune recovery and reduced complications, consistent with enhanced protein/nitrogen support.

  5. Major liver resection results in a changed plasma amino acid pattern as reflected by a decreased Fischer ratio which improves by bactericidal/permeability increasing protein

    PubMed ID: 11169074

    Demonstrates large alanine flux post‑injury—supports the concept of alanine as an amino‑acid building block available during recovery, though not tested as supplement.

  6. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    Significant improvements in nitrogen balance and higher albumin in the L‑alanyl‑L‑glutamine group support anabolic/protein‑building effects.

  7. Dietary treatment of rheumatoid cachexia with beta-hydroxy-beta-methylbutyrate, glutamine and arginine: a randomised controlled trial

    PubMed ID: 15896432

    Alanine-containing placebo increased total body protein and limb lean mass in rheumatoid cachexia — reasonable indirect evidence for supporting protein accrual.

  8. L-alanin-L-glutamine supplementation improves the outcome after colorectal surgery for cancer

    PubMed ID: 17573745

    Reduced wound complications and shorter hospital stay with alanyl–glutamine suggest improved tissue repair/protein synthesis during recovery.

  9. [Impact of intravenous nutrition on plasma free amino acid spectrum and immune function for patients with sepsis]

    PubMed ID: 17571315

    Administration of amino‑acid–containing IV nutrition (including alanine) provides direct substrates for protein synthesis—strong mechanistic relevance.

  10. Glutamine-enriched nutrition does not reduce mucosal morbidity or complications after stem-cell transplantation for childhood malignancies: a prospective randomized study

    PubMed ID: 21499196

    Alanyl‑glutamine is an amino‑acid dipeptide (direct source of building blocks for protein synthesis) even though the study found no clinical benefit for mucositis.

  11. Comparison of Intradialytic Parenteral Nutrition with Glucose or Amino Acid Mixtures in Maintenance Hemodialysis Patients

    PubMed ID: 27271658

    Amino‑acid infusion raised serum albumin vs glucose infusion — indicates amino‑acid provision (including alanine shifts) can support protein status.

  12. Effect of the route of nutrition and L-alanyl-L-glutamine supplementation in amino acids' concentration in trauma patients

    PubMed ID: 28980034

    Providing alanyl‑glutamine raises substrate amino acids (alanine + glutamine) that can contribute to protein synthesis/recovery in catabolic patients.

  13. Supplementing an energy adequate, higher protein diet with protein does not enhance fat-free mass restoration after short-term severe negative energy balance

    PubMed ID: 28385919

    Tracer measurements of net protein balance and refeeding after deficit give direct mechanistic relevance to alanine/protein metabolism.

  14. High-intensity interval training and essential amino acid supplementation: Effects on muscle characteristics and whole-body protein turnover

    PubMed ID: 33369879

    EAA supplementation with HIIT maintained whole‑body protein synthesis; alanine tracer data supported measurement of anabolic/catabolic flux — relevant to protein accrual processes.

  15. Randomized Trial to Assess the Safety and Tolerability of Daily Intake of an Allulose Amino Acid-Based Hydration Beverage in Men and Women

    PubMed ID: 38892699

    Directly contains amino acids including L‑alanine — strong mechanistic support for providing building blocks though no direct anabolic outcomes were measured.

  16. Prospective randomized, placebo-controlled study: role of branched-chain amino acids infusion as adjunct therapy post-liver surgery for patients in the intensive care unit

    PubMed ID: 40537743

    BCAA infusion after liver surgery improved bilirubin, PT and clinical recovery — supports amino‑acid provision for protein synthesis and repair (not alanine specific).

Muscle maintenance (17)
  1. Nitrogen balance, 3-methylhistidine excretion, and plasma amino acid profile in infants after cardiac operations for congenital heart defects: the effect of early nutritional support

    PubMed ID: 9434700

    Parenteral amino acids after infant heart surgery improved nitrogen balance and prevented the postoperative fall in plasma alanine and markers of proteolysis (directly supports muscle preservation).

  2. Short-term restorative nutrition in malnourished patients: pro's and con's of intravenous and enteral alimentation using compositionally matched nutrients

    PubMed ID: 9372379

    IV enteral amino‑acid nutrition achieved positive nitrogen balance faster than glucose‑only/enteral, consistent with supporting protein/muscle maintenance.

  3. [Effect of alanyl-glutamine in postoperative total parenteral nutrition on postoperative immunosuppression and morbidity. Preliminary results of a prospective randomized study]

    PubMed ID: 9931687

    Alanyl‑glutamine TPN supports postoperative protein/immune recovery, indirectly supporting muscle maintenance.

  4. Hypermetabolism and increased peripheral release of amino acids after subarachnoidal hemorrhage and its operative treatment

    PubMed ID: 8875516

    Alanyl‑glutamine provides amino acids (glutamine+alanine) that can support muscle amino acid pools.

  5. Effects of an oral androgen on muscle and metabolism in older, community-dwelling men

    PubMed ID: 12388137

    Oxymetholone increased lean body mass and strength (drug trial—relevant to muscle mass but not alanine supplementation).

  6. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    Improved nitrogen balance with L‑alanyl‑L‑glutamine suggests protein‑sparing effects relevant to muscle maintenance after surgical stress.

  7. Dietary treatment of rheumatoid cachexia with beta-hydroxy-beta-methylbutyrate, glutamine and arginine: a randomised controlled trial

    PubMed ID: 15896432

    Rheumatoid cachexia trial: alanine-containing placebo raised fat-free mass, total body protein and limb lean mass similar to active mixture — reasonable indirect support for muscle maintenance.

  8. Effect of creatine and beta-alanine supplementation on performance and endocrine responses in strength/power athletes

    PubMed ID: 17136944

    Creatine + beta‑alanine produced larger gains in lean mass and strength in football players, supporting a role for beta‑alanine in muscle maintenance (confounded by creatine).

  9. Effect of two β-alanine dosing protocols on muscle carnosine synthesis and washout

    PubMed ID: 21847611

    Dose-dependent increases in muscle carnosine directly support muscle buffering and function—mechanistically relevant to maintenance.

  10. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Alanine–glutamine dipeptide perioperative infusion is a direct amino‑acid intervention likely to support muscle substrate and reduce injury markers.

  11. Oral nutritional supplement fortified with beta-alanine improves physical working capacity in older adults: a randomized, placebo-controlled study

    PubMed ID: 23832078

    Beta-alanine nutritional intervention improved physical work capacity/muscle function in older adults (supports muscle maintenance indirectly).

  12. Supplementing an energy adequate, higher protein diet with protein does not enhance fat-free mass restoration after short-term severe negative energy balance

    PubMed ID: 28385919

    Tracer study of protein turnover during negative energy balance and refeeding — directly relevant to lean mass/protein maintenance.

  13. Association of skeletal muscle and serum metabolites with maximum power output gains in response to continuous endurance or high-intensity interval training programs: The TIMES study - A randomized controlled trial

    PubMed ID: 30742692

    Study measured muscle alanine and found baseline alanine linked to training-induced power gains, implying a role in muscle adaptation/maintenance.

  14. The Effect of Beta-Alanine versus Alkaline Agent Supplementation Combined with Branched-Chain Amino Acids and Creatine Malate in Highly-Trained Sprinters and Endurance Athletes: A Randomized Double-Blind Crossover Study

    PubMed ID: 31438535

    Combination including β-alanine increased fat‑free mass in sprinters—evidence for muscle‑mass support though other supplements present.

  15. High-intensity interval training and essential amino acid supplementation: Effects on muscle characteristics and whole-body protein turnover

    PubMed ID: 33369879

    HIIT ± EAA trial showed maintained protein synthesis and increased thigh lean mass; alanine tracer measured whole‑body protein turnover relevant to muscle maintenance.

  16. Effect of an enteral amino acid blend on muscle and gut functionality in critically ill patients: a proof-of-concept randomized controlled trial

    PubMed ID: 36397118

    Small RCT in ICU: a tailored 5‑AA enteral supplement increased quadriceps volume and diaphragm strength — direct muscle maintenance signal (but the reported formula reportedly did not include alanine).

  17. Evaluation of the recovery after heart surgery following preoperative supplementation with a combination of beta-hydroxy-beta-methylbutyrate, L-arginine, and L-glutamine: a double-blind randomized placebo-controlled clinical trial

    PubMed ID: 35964137

    Perioperative supplement (glutamine/arginine/HMB) improved recovery/markers of muscle injury — conceptually relevant to amino‑acid support for muscle (alanine is an amino acid used in muscle metabolism).

Exercise recovery (15)
  1. Six weeks of high-intensity interval training with and without beta-alanine supplementation for improving cardiovascular fitness in women

    PubMed ID: 20386120

    Beta-alanine supplementation was studied with exercise training and is commonly linked to improved recovery/repeated-bout performance; trial showed improved exercise capacity.

  2. Effect of creatine and beta-alanine supplementation on performance and endocrine responses in strength/power athletes

    PubMed ID: 17136944

    Beta‑alanine (with creatine) improved performance/strength outcomes in athletes, suggesting potential benefit for recovery from training (study used combination supplement).

  3. Effects of twenty-eight days of beta-alanine and creatine monohydrate supplementation on the physical working capacity at neuromuscular fatigue threshold

    PubMed ID: 17194255

    Beta-alanine improved neuromuscular fatigue threshold and PWC(FT), implying faster recovery/less performance decline post-exercise (beta‑alanine, not L‑alanine).

  4. Mental and physical fatigue-related biochemical alterations

    PubMed ID: 18834718

    Physical fatigue caused plasma alanine decrease — indicates alanine involvement in recovery/energy replenishment after exertion.

  5. Effect of two β-alanine dosing protocols on muscle carnosine synthesis and washout

    PubMed ID: 21847611

    Higher muscle carnosine can reduce intramuscular acidosis and may speed recovery from high-intensity work.

  6. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Perioperative alanine–glutamine reduced cardiac injury markers and improved indices—supports recovery from physiological stress via amino‑acid provision.

  7. Additive effects of beta-alanine and sodium bicarbonate on upper-body intermittent performance

    PubMed ID: 23595205

    Beta-alanine and bicarbonate each improved intermittent upper‑body performance and their combination produced additive gains — relevant to recovery between efforts.

  8. Oral nutritional supplement fortified with beta-alanine improves physical working capacity in older adults: a randomized, placebo-controlled study

    PubMed ID: 23832078

    Older-adult trial with beta-alanine improved physical working capacity, implying improved capacity to recover between efforts.

  9. Influence of training status on high-intensity intermittent performance in response to β-alanine supplementation

    PubMed ID: 24500111

    β-alanine improved repeated high‑intensity exercise performance, which can translate to improved recovery between bouts.

  10. Comparison of Two β-Alanine Dosing Protocols on Muscle Carnosine Elevations

    PubMed ID: 28910200

    β-alanine increased muscle carnosine and is associated with reduced exercise-induced fatigue, supporting recovery between efforts.

  11. The Effect of Beta-Alanine versus Alkaline Agent Supplementation Combined with Branched-Chain Amino Acids and Creatine Malate in Highly-Trained Sprinters and Endurance Athletes: A Randomized Double-Blind Crossover Study

    PubMed ID: 31438535

    β-alanine + BCAA + creatine reduced post‑exercise ammonia and was associated with training benefits—consistent with faster metabolic recovery (confounded by co‑supplements).

  12. Effects of a commercially available branched-chain amino acid-alanine-carbohydrate-based sports supplement on perceived exertion and performance in high intensity endurance cycling tests

    PubMed ID: 31959202

    Nine-week BCAA+alanine+CHO reduced perceived exertion and improved recovery and repeat-interval performance; alanine included but multi-ingredient limits specific attribution.

  13. High-intensity interval training and essential amino acid supplementation: Effects on muscle characteristics and whole-body protein turnover

    PubMed ID: 33369879

    Study used alanine tracer to quantify protein synthesis and turnover after HIIT+EAA—directly relevant to recovery and muscle repair processes.

  14. Randomized Trial to Assess the Safety and Tolerability of Daily Intake of an Allulose Amino Acid-Based Hydration Beverage in Men and Women

    PubMed ID: 38892699

    Hydration/amino‑acid product (including L‑alanine) is plausibly intended for rehydration/recovery though trial only assessed tolerability.

  15. Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial

    PubMed ID: 40010353

    RCT in athletes found beta-alanine (alone or in combos) enhanced performance outcomes over training, supporting improved recovery/ability to sustain repeated efforts.

Endurance (15)
  1. Six weeks of high-intensity interval training with and without beta-alanine supplementation for improving cardiovascular fitness in women

    PubMed ID: 20386120

    Randomized trial studied beta-alanine (a form of alanine) with HIIT and reported improvements in VO2peak/ventilatory threshold—direct relevance to endurance performance.

  2. Effect of two β-alanine dosing protocols on muscle carnosine synthesis and washout

    PubMed ID: 21847611

    Robust, dose-dependent increases in muscle carnosine—mechanistically linked to improved high-intensity endurance/anaerobic capacity.

  3. Additive effects of beta-alanine and sodium bicarbonate on upper-body intermittent performance

    PubMed ID: 23595205

    Beta-alanine (and bicarbonate) produced clear, additive improvements in intermittent upper‑body total work (+7–14%), strong evidence for enhanced high‑intensity endurance (beta‑alanine related).

  4. Oral nutritional supplement fortified with beta-alanine improves physical working capacity in older adults: a randomized, placebo-controlled study

    PubMed ID: 23832078

    Oral beta-alanine supplement improved physical working capacity in older adults (clinical evidence of improved endurance capacity).

  5. The effects of beta-alanine supplementation on physical working capacity at heart rate threshold

    PubMed ID: 24308676

    β‑alanine supplementation increased physical working capacity at heart‑rate threshold, a direct endurance‑related endpoint.

  6. The effects of beta alanine plus creatine administration on performance during repeated bouts of supramaximal exercise in sedentary men

    PubMed ID: 25289715

    β‑alanine (with creatine) produced substantial increases in mean and peak power during repeated high‑intensity cycling—strongest direct performance evidence in dataset.

  7. Influence of training status on high-intensity intermittent performance in response to β-alanine supplementation

    PubMed ID: 24500111

    β-alanine (6.4 g/day) produced clear, statistically significant improvements in repeated high‑intensity cycling (total work done) — strong ergogenic/endurance signal for short high‑intensity efforts.

  8. Comparison of Two β-Alanine Dosing Protocols on Muscle Carnosine Elevations

    PubMed ID: 28910200

    β-alanine supplementation significantly raised muscle carnosine—well-established mechanism that enhances high-intensity endurance and performance.

  9. Association of skeletal muscle and serum metabolites with maximum power output gains in response to continuous endurance or high-intensity interval training programs: The TIMES study - A randomized controlled trial

    PubMed ID: 30742692

    Baseline muscle alanine was moderately associated with improvements in maximal power output after endurance or interval training, implying a link to exercise performance/endurance adaptation.

  10. The Effect of Beta-Alanine versus Alkaline Agent Supplementation Combined with Branched-Chain Amino Acids and Creatine Malate in Highly-Trained Sprinters and Endurance Athletes: A Randomized Double-Blind Crossover Study

    PubMed ID: 31438535

    β-alanine (with BCAA+creatine) improved lean mass and reduced ammonia in athletes and showed small performance benefits in sprinters—moderate evidence though multi‑ingredient.

  11. Effects of Combined Versus Single Supplementation of Creatine, Beta-Alanine, and L-Citrulline During Short Sprint Interval Training on Basketball Players' Performance: A Double-Blind Randomized Placebo-Controlled Trial

    PubMed ID: 40010353

    Beta-alanine supplementation (in the context of sprint-interval training) produced superior performance improvements vs placebo, consistent with improved high-intensity endurance/anaerobic capacity.

  12. Effects of a commercially available branched-chain amino acid-alanine-carbohydrate-based sports supplement on perceived exertion and performance in high intensity endurance cycling tests

    PubMed ID: 31959202

    Marked increase in time-to-exhaustion (≈+61%) with the BCAA+alanine+CHO supplement, showing a strong endurance benefit in this trial though multi-ingredient limits attribution to alanine alone.

  13. Effect of creatine and beta-alanine supplementation on performance and endocrine responses in strength/power athletes

    PubMed ID: 17136944

    Athletic performance/strength improvements with beta‑alanine + creatine suggest potential endurance benefits from beta‑alanine component.

  14. Effects of 28 days of beta-alanine and creatine monohydrate supplementation on aerobic power, ventilatory and lactate thresholds, and time to exhaustion

    PubMed ID: 16953366

    Four-week beta-alanine ± creatine study reported within-group endurance improvements (particularly creatine+beta-alanine), though between-group differences were less clear.

  15. Effects of twenty-eight days of beta-alanine and creatine monohydrate supplementation on the physical working capacity at neuromuscular fatigue threshold

    PubMed ID: 17194255

    Four‑week beta‑alanine supplementation significantly increased neuromuscular fatigue threshold and physical working capacity in untrained men — strong, direct performance signal (note: beta‑alanine is a different isomer than L‑alanine).

Immune support (13)
  1. Long-term titrated recombinant interferon-alpha 2a in chronic hepatitis C: a randomized controlled trial

    PubMed ID: 7493300

    Interferon therapy produced viral clearance and ALT normalization — strong immune-therapy evidence (indirect to alanine supplement).

  2. [Effect of alanyl-glutamine in postoperative total parenteral nutrition on postoperative immunosuppression and morbidity. Preliminary results of a prospective randomized study]

    PubMed ID: 9931687

    Randomized TPN trial: alanyl‑glutamine reduced systemic inflammation and sped immune marker recovery — direct immune benefit.

  3. Perioperative GLY-GLN infusion diminishes the surgery-induced period of immunosuppression: accelerated restoration of the lipopolysaccharide-stimulated tumor necrosis factor-alpha response

    PubMed ID: 12496537

    Direct test of an alanine-containing dipeptide (l‑alanyl‑l‑glutamine) vs glycyl‑glutamine for perioperative immune restoration; alanine‑dipeptide was less effective at restoring LPS‑stimulated TNF‑α (clear immune-relevant data).

  4. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    L‑alanyl‑L‑glutamine group had significantly reduced infectious morbidity and higher IgA — direct evidence for immune support in the trial population.

  5. L-alanin-L-glutamine supplementation improves the outcome after colorectal surgery for cancer

    PubMed ID: 17573745

    L-alanyl–L-glutamine supplementation around colorectal surgery significantly reduced wound infections and intra‑abdominal abscesses, indicating support for host defenses/immune-mediated outcomes.

  6. Effect of dipeptide of glutamine and alanine on severe traumatic brain injury

    PubMed ID: 17535636

    Glutamine–alanine dipeptide in nutrition for severe TBI was associated with higher lymphocyte counts and trends toward fewer infections and shorter ICU stays (non-significant), suggesting immune support.

  7. [Impact of intravenous nutrition on plasma free amino acid spectrum and immune function for patients with sepsis]

    PubMed ID: 17571315

    In septic patients, amino-acid nutrition (containing alanine) improved some immune proteins (IgM/C3/C4) and free alanine levels, showing immune-related effects.

  8. Cytokine responses in very low birth weight infants receiving glutamine-enriched enteral nutrition

    PubMed ID: 19172131

    Directly measured systemic cytokine responses in very-low-birth-weight infants where L-alanine served as the isonitrogenous placebo — highly relevant to immune outcomes (though alanine was placebo).

  9. Immunopathogenesis of hepatic flare in HIV/hepatitis B virus (HBV)-coinfected individuals after the initiation of HBV-active antiretroviral therapy

    PubMed ID: 19231993

    Study of immune restoration hepatic flares in HIV/HBV coinfection links immune activation and liver injury; relevant to immune–liver interactions.

  10. The effect of L-alanyl-L-glutamine dipeptide supplemented total parenteral nutrition on infectious morbidity and insulin sensitivity in critically ill patients

    PubMed ID: 21336131

    Alanyl‑glutamine supplemented TPN in ICU patients produced substantially fewer nosocomial infections compared with control.

  11. Effect of the route of nutrition and L-alanyl-L-glutamine supplementation in amino acids' concentration in trauma patients

    PubMed ID: 28980034

    Alanyl‑glutamine increased glutamine and alanine — glutamine is immunomodulatory and alanyl‑glutamine is used clinically to support critically ill patients' nitrogen and immune substrates.

  12. Antioxidant Activity with Increased Endogenous Levels of Vitamin C, E and A Following Dietary Supplementation with a Combination of Glutathione and Resveratrol Precursors

    PubMed ID: 33105552

    Supplement containing alanine (as a glutathione precursor mix) increased cellular GSH and antioxidant vitamins and reduced urinary neopterin (inflammation marker) — supports an immune/antioxidant benefit from the preparative mixture that included alanine.

  13. Clinical efficacy of ulinastatin in the treatment of unliquefied pyogenic liver abscess complicated by septic shock: A randomized controlled trial

    PubMed ID: 37102655

    Ulinastatin RCT reduced inflammatory markers (CRP, PCT, IL‑6, TNF‑α) in septic liver abscess — shows anti‑inflammatory/immunomodulatory effects (not alanine supplement).

Detoxification (6)
  1. Therapeutic effects of reduced glutathione on liver function, fibrosis, and HBV DNA clearance in chronic hepatitis B patients

    PubMed ID: 39920583

    Reduced glutathione adjunct markedly improved ALT and fibrosis markers—glutathione is directly involved in detoxification pathways (relevant comparator to amino-acid–related detox).

  2. Metabolomics strategy comprehensively unveils the effect of catechins intervention on the biomarkers of exposure to acrylamide and biomarkers of cardiometabolic risk

    PubMed ID: 36191485

    Catechin supplementation changed biomarkers of acrylamide detoxification (mercapturic acid pathway) and restored related metabolomic pathways.

  3. Antioxidant Activity with Increased Endogenous Levels of Vitamin C, E and A Following Dietary Supplementation with a Combination of Glutathione and Resveratrol Precursors

    PubMed ID: 33105552

    Supplements containing alanine (as a glutathione precursor mix) significantly increased erythrocyte GSH and antioxidant vitamins—direct biochemical evidence supporting detox/antioxidant pathway support from the mixture that included alanine.

  4. Efficacy and safety of magnesium isoglycyrrhizinate injection in patients with acute drug-induced liver injury: A phase II trial

    PubMed ID: 31379118

    Magnesium isoglycyrrhizinate increased ALT normalization rates in acute DILI patients—directly relevant to hepatic detox/repair (ALT = alanine aminotransferase marker).

  5. Fenofibrate lowers atypical sphingolipids in plasma of dyslipidemic patients: A novel approach for treating diabetic neuropathy?

    PubMed ID: 26228675

    Reduction of neurotoxic 1‑deoxy‑sphingolipids (products of abnormal alanine use) after fenofibrate implies removal/avoidance of toxic metabolites tied to alanine metabolism (indirect evidence for a detoxifying/metabolic benefit).

  6. A non-inferiority randomised controlled trial of a shorter acetylcysteine regimen for paracetamol overdose - the SARPO trial

    PubMed ID: 40414507

    Acetylcysteine is a primary antidote for paracetamol; the trial shows a shorter regimen preserved detox/liver outcomes (not alanine-related).

Vitality (5)
  1. Impact of Distinct Antiandrogen Exposures on the Plasma Metabolome in Feminizing Gender-affirming Hormone Therapy

    PubMed ID: 38609170

    Sustained shifts in plasma alanine after hormonal therapy reflect systemic metabolic change that could affect perceived vitality, indirectly.

  2. Differential Metabolites and Metabolic Pathways Involved in Aerobic Exercise Improvement of Chronic Fatigue Symptoms in Adolescents Based on Gas Chromatography-Mass Spectrometry

    PubMed ID: 35206569

    Exercise program led to substantial improvements in fatigue and oxidative stress, consistent with improved vitality.

  3. Serum metabolite profiling yields insights into health promoting effect of A. muciniphila in human volunteers with a metabolic syndrome

    PubMed ID: 34812127

    Metabolic reshaping (lower alanine, more ketogenesis/acylcarnitines) in prediabetic subjects suggests improved metabolic health that could support vitality.

  4. Effect of probiotic supplementation on plasma metabolite profile after Roux-Y gastric bypass: a prospective, randomized, double-blind, placebo-controlled clinical trial

    PubMed ID: 35987956

    Significant shifts in alanine and ketone levels after probiotic suggest notable systemic metabolic effects likely to impact energy/vitality.

  5. [Cardioprotective effects of glutamine in patients with ischemic heart disease operated under conditions of extracorporeal blood circulation]

    PubMed ID: 22834281

    Comprehensive perioperative benefits (improved cardiac biomarkers and hemodynamics) after alanine–glutamine infusion suggest enhanced physiological resilience/vitality.

Mood balance (4)
  1. A single administration of 'microbial' D-alanine to healthy volunteers augments reaction to negative emotions: A comparison with D-serine

    PubMed ID: 32167001

    Acute D‑alanine administration changed emotional processing (faster recognition of negative emotions), directly relevant to mood/emotional processing.

  2. D-alanine added to antipsychotics for the treatment of schizophrenia

    PubMed ID: 16154544

    Adjunctive D‑alanine produced significant clinical improvements in schizophrenia (PANSS/CGI) over 6 weeks — reasonably strong signal for central/neuropsychiatric benefit (mood/cognition/negative symptoms).

  3. Role of β-Alanine Supplementation on Cognitive Function, Mood, and Physical Function in Older Adults; Double-Blind Randomized Controlled Study

    PubMed ID: 36839281

    β‑alanine RCT showed significant decreases in depressive symptoms (GDS) in older adults — direct human evidence for mood benefit with β‑alanine.

  4. Ketogenic diet is less effective in ameliorating depression and anxiety in obesity than Mediterranean diet: A pilot study for exploring the GUT-brain axis

    PubMed ID: 41197688

    Mediterranean diet improved depressive symptoms vs ketogenic; microbiota-mediated increases in brain alanine were linked to anxiety-like behaviors in mice (associative evidence).

Skin repair (4)
  1. L-alanyl-L-glutamine-supplemented parenteral nutrition improves infectious morbidity in secondary peritonitis

    PubMed ID: 14757388

    Reduced infectious morbidity and improved protein markers (albumin) in surgical patients support improved healing/wound outcomes indirectly.

  2. [Effect of alanyl-glutamine in postoperative total parenteral nutrition on postoperative immunosuppression and morbidity. Preliminary results of a prospective randomized study]

    PubMed ID: 9931687

    Postoperative alanyl‑glutamine reduced complications and improved immune recovery — consistent with enhanced wound healing.

  3. [Prevention of radiochemotherapy-induced mucositis. Value of the prophylactic mouth rinsing with PVP-iodine solution]

    PubMed ID: 9524624

    Povidone-iodine mouth rinse substantially reduced incidence, severity, and duration of oral mucositis in radiochemotherapy patients — applicable to mucosal wound healing.

  4. L-alanin-L-glutamine supplementation improves the outcome after colorectal surgery for cancer

    PubMed ID: 17573745

    Direct randomized trial: parenteral L-alanyl–L-glutamine around colorectal surgery significantly reduced wound infections, abscesses and wound dehiscence and shortened hospital stay — strong evidence for wound‑repair benefit.

Appetite regulation (3)
  1. A randomized Phase I study of the safety, tolerability, pharmacokinetics and pharmacodynamics of BI 456906, a dual glucagon receptor/glucagon-like peptide-1 receptor agonist, in healthy Japanese men with overweight/obesity

    PubMed ID: 36974349

    Dual GCGR/GLP‑1 agonist produced substantial weight loss with appetite‑related adverse events and reduced plasma alanine — strong appetite regulation effect (drug‑mediated).

  2. Comparison of Intradialytic Parenteral Nutrition with Glucose or Amino Acid Mixtures in Maintenance Hemodialysis Patients

    PubMed ID: 27271658

    Intradialytic glucose infusion increased energy intake while altering alanine levels — supports a link between substrate provision, alanine changes and appetite/energy intake.

  3. Differential effects of dairy snacks on appetite, but not overall energy intake

    PubMed ID: 22380537

    Randomized dietary snack study found yogurt suppressed appetite and raised plasma alanine — strongest direct link in the dataset to appetite regulation.

Hair & Nails (2)
  1. Efficacy of intramuscular injections of biotin and dexpanthenol in the treatment of diffuse hair loss: A randomized, double-blind controlled study comparing two brands

    PubMed ID: 35791704

    Weekly biotin+dexpanthenol injections improved hair fall counts and density versus baseline — direct hair‑health outcome.

  2. L-alanin-L-glutamine supplementation improves the outcome after colorectal surgery for cancer

    PubMed ID: 17573745

    Significant reduction in wound infections and complications implies improved skin/tissue healing with L-alanyl–L-glutamine perioperatively.

Hormone balance (1)
  1. Impact of Distinct Antiandrogen Exposures on the Plasma Metabolome in Feminizing Gender-affirming Hormone Therapy

    PubMed ID: 38609170

    Randomized anti‑androgen allocation produced clear decreases in plasma alanine — direct evidence linking hormonal state to alanine levels.

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Products with Alanine

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Being studied right now

Recruiting clinical trials registered on ClinicalTrials.gov. A trial in progress has no result yet — this is what the field is asking, not what it found.