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 serving | Products |
|---|---|
| 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 dose | Study 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 |
Benefit Evidence
Alanine oxidation +15%
Nitrogen balance improved
Alanine transport ↓30%
Research sources
Liver support (59)
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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).
- 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).
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- [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.
- 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.
- 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.
- [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).
- 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.
- [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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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).
- [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.
- 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.
- [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.
- 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)
- 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.
- 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.
- 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).
- [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.
- 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.
- 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.
- 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).
- 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.
- [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.
- 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.
- 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.
- 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.
- 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).
- 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.
- 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).
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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.
- Mental and physical fatigue-related biochemical alterations
PubMed ID: 18834718
Exercise‑related alanine shifts indicate a role in systemic metabolic balance during/after exertion.
- 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.
- 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.
- [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)
- 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).
- 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).
- 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.
- 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.
- 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).
- 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).
- [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.
- 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).
- 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.
- 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).
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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.
- 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)
- 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.
- 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.
- 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.
- 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.
- [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.
- 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.
- 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.
- 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.
- 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).
- 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.
- [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.
- 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.
- [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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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).
- [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.
- 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.
- 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.
- 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).
- 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.
- [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).
- 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).
- 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.
- 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.
- 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.
- 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.
- [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.
- 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).
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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)
- 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.
- [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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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)
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- [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.
- 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).
- 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.
- 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).
- [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.
- 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).
- 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).
- 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).
- [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.
- 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).
- 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)
- [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.
- 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.
- 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.
- [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.
- 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.
- 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.
- 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.
- 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.
- [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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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)
- 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).
- 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.
- [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.
- 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.
- 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).
- 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.
- 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.
- 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).
- 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.
- [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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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).
- 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)
- 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.
- 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).
- 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).
- 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.
- 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.
- [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.
- 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.
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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)
- 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.
- 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.
- 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).
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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)
- 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).
- [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.
- 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).
- 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.
- 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.
- 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.
- [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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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)
- 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).
- 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.
- 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.
- 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).
- 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).
- 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)
- 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.
- 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.
- 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.
- 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.
- [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)
- 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.
- 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).
- 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.
- 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)
- 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.
- [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.
- [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.
- 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)
- 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).
- 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.
- 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)
- 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.
- 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)
- 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.
Similar by evidence
Supplements the same benefits carry qualifying findings for — a fact about the evidence graph, not a recommendation to swap.
Products with Alanine
Search all1102 products whose verified label declares Alanine — not every bottle that mentions it in a title.
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.