General Dosage
1-3 g daily, divided into 1-2 doses with a carbohydrate-containing meal
Maximum dose: 3-6 g/day used safely; doses above 3 g may increase TMAO production (a cardiovascular risk marker)
L-Carnitine Dosage Guide
This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer
Dosage Recommendations
General recommendation: 1-3 g daily, divided into 1-2 doses with a carbohydrate-containing meal
Timing: With a carbohydrate-containing meal to enhance muscle uptake via insulin • Take with food for best absorption.
Dosage by Condition
Exercise recovery
2-3 g L-carnitine L-tartrate dailyModerate
Cardiovascular support
2-3 g dailyStrong
Male fertility
2-3 g daily for 3-6 monthsModerate
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Exercise recovery | 2-3 g L-carnitine L-tartrate daily | Moderate |
| Cardiovascular support | 2-3 g daily | Strong |
| Male fertility | 2-3 g daily for 3-6 months | Moderate |
Upper limit: 3-6 g/day used safely; doses above 3 g may increase TMAO production (a cardiovascular risk marker)
Timing & Absorption
With a carbohydrate-containing meal to enhance muscle uptake via insulin
Best taken with food for optimal absorption.
References
- DiNicolantonio JJ, Lavie CJ, Fares H, et al. (2013). L-Carnitine in the secondary prevention of cardiovascular disease: systematic review and meta-analysis. Mayo Clinic Proceedings. DOI PubMed
- Koeth RA, Wang Z, Levison BS, et al. (2013). Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis. Nature Medicine. DOI PubMed
- Spiering BA, Kraemer WJ, Vingren JL, et al. (2007). Responses of criterion variables to different supplemental doses of L-carnitine L-tartrate. Journal of Strength and Conditioning Research. DOI PubMed