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L-Carnitine: study protocols

12 study groups say how much L-Carnitine participants took a day. These are the doses the studies gave. They are not a recommendation.

L-Carnitine: what the research found →

Dose per serving from products

851 products in our catalogue print how much L-Carnitine a serving holds.

Most common: 250 mg to 500 mg, 20% of 851 products.

Dose per servingProducts
5 mg or less
7
5 mg to 10 mg
58
10 mg to 25 mg
66
25 mg to 50 mg
42
50 mg to 100 mg
75
100 mg to 250 mg
101
250 mg to 500 mg
169
500 mg to 1 g
159
1 g to 2.5 g
78
2.5 g to 5 g
95
over 5 g
1

Dose per serving from research

11 study groups in 9 studies say how much L-Carnitine participants took a day.

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

Most common: 2.5 g to 5 g, 45% of 11 study groups.

Daily doseStudy groups
1 g or less
1
1 g to 2.5 g
3
2.5 g to 5 g
5
5 g to 10 g
2

Commonly used together

2 of 12 study groups took L-Carnitine with something else, but nothing that 3 or more different studies gave.

12 study groups

Study
Adding L-carnitine to clomiphene resistant PCOS women improves the quality of ovulation and the pregnancy rate. A randomized clinical trial
2014 · Group A · Women with clomiphene-resistant PCOS
3 g—85
Randomised clinical trial: the efficacy and safety of propionyl-L-carnitine therapy in patients with ulcerative colitis receiving stable oral treatment
2011 · PLC 1 g/day group · Adults aged 18–75 with mild-to-moderate ulcerative colitis receiving stable oral aminosalicylate or thiopurine therapy
1 g—40
Randomised clinical trial: the efficacy and safety of propionyl-L-carnitine therapy in patients with ulcerative colitis receiving stable oral treatment
2011 · PLC 2 g/day group · Adults aged 18–75 with mild-to-moderate ulcerative colitis receiving stable oral aminosalicylate or thiopurine therapy
2 g—39
L-Carnitine treatment reduces severity of physical and mental fatigue and increases cognitive functions in centenarians: a randomized and controlled clinical trial
2007 · levocarnitine group · centenarians with fatigue onset after even slight physical activity; sex not reported
2 g—32
Controlled study on L-carnitine therapeutic efficacy in post-infarction
1992 · L-carnitine group · Adults aged 39–86 years, both sexes, with recent myocardial infarction
4 g1 year81
Levocarnitine administration in elderly subjects with rapid muscle fatigue: effect on body composition, lipid profile and fatigue
2003 · levocarnitine group · elderly men and women with rapid muscle fatigue following slight physical activity
4 g30 days42
Combined Metabolic Activators Accelerates Recovery in Mild-to-Moderate COVID-19
2021 · CMA group, phase 3 · Adults aged 18–66 with PCR-confirmed mild-to-moderate COVID-19 who did not require hospitalization
7.46 g2 weeks229
Combined Metabolic Activators Accelerates Recovery in Mild-to-Moderate COVID-19
2021 · CMA group, phase 2 · Adults aged 19–66 with PCR-confirmed mild-to-moderate COVID-19 who did not require hospitalization
7.46 g2 weeks71
The effects of L-carnitine supplementation on inflammation, oxidative stress, and clinical outcomes in critically Ill patients with sepsis: a randomized, double-blind, controlled trial
2024 · L-carnitine group · Adults older than 18 years with sepsis admitted to an ICU and receiving enteral nutrition; men and women
3 g7 days30
Low Bioavailability and High TMAO Production: Novel Insights Into Acetylcarnitine and Carnitine Metabolism
2025 · Carnitine repeated · Healthy adult volunteers, men and women; no stated disease
2.42 g7 days6