General Dosage
1-3 g daily depending on form and goal
Maximum dose: 4 g/day; higher doses increase GI side effects and TMAO production
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 depending on form and goal
Timing: Take with a carbohydrate-containing meal — insulin drives carnitine uptake into muscle (Wall et al., 2011) • Take with food for best absorption.
Dosage by Condition
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Exercise recovery (LCLT) | 2-3 g LCLT daily | Moderate |
| Cognitive support (ALCAR) | 1.5-3 g ALCAR daily | Moderate |
| Fat loss | Not effective in healthy individuals | Insufficient |
Upper limit: 4 g/day; higher doses increase GI side effects and TMAO production
Timing & Absorption
Take with a carbohydrate-containing meal — insulin drives carnitine uptake into muscle (Wall et al., 2011)
Best taken with food for optimal absorption.
References
- 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
- Wall BT, Stephens FB, Constantin-Teodosiu D, et al. (2011). Chronic oral ingestion of L-carnitine and carbohydrate increases muscle carnitine content and alters muscle fuel metabolism during exercise in humans. Journal of Physiology. DOI PubMed
- Montgomery SA, Thal LJ, Amrein R (2003). Meta-analysis of double blind randomized controlled clinical trials of acetyl-L-carnitine versus placebo in the treatment of mild cognitive impairment and mild Alzheimer's disease. International Clinical Psychopharmacology. DOI PubMed