L-Carnitine for Weight Loss Support
Carnitine produces small weight reductions, mainly in obese and older populations.
Overview
Verdict
How It Works
Dosing & Protocol
Typical dose
- Recommended dose
- 2g/day with carbohydrate
- Expected timeframe
- 12-24 weeks
Protocol
- form
- Not applicable
- duration
- Not applicable
- co factor
- Evidence is insufficient for clinically meaningful weight loss. A meta-analysis of randomised trials found carnitine supplementation at around 2 g/day produced modest weight reduction versus placebo - roughly 1-1.3 kg on average - with the effect diminishing over time and largely disappearing in longer trials, and several individual studies found no difference at all. Most trials were short, many in overweight or obese participants alongside dietary advice, and heterogeneity was high. Mechanistically the ceiling is clear: muscle carnitine is already near saturation in healthy people, oral carnitine does not raise it without a large insulin stimulus, and increasing fatty acid transport does not create an energy deficit. Weight loss requires that deficit.
- titration
- Not applicable
- starting dose
- Not applicable as an established weight loss treatment
Evidence
What the studies say
Clinical evidence of the effects of carnitine supplementation on body weight, glycemic control and serum lipids in women with polycystic ovary syndrome: a systematic review and meta-analysis
Liao D, Liu X, Yuan X +4 more
carnitine supplements significantly decreased ... body weight, body mass index, hip circumference, and waist circumference
Safety
Caveats
Raises TMAO. Effects are small.
Less likely to help if
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.