Approved drug — used here for education. This is an approved/prescription medicine in at least one region; "research"/compounded versions sold as chemicals are a separate, riskier thing. Not medical advice.
What it is
L-Carnitine is a naturally occurring amino-acid derivative (not a peptide) essential for transporting fatty acids into mitochondria to be burned for energy.
Proposed mechanism
It shuttles long-chain fatty acids across the mitochondrial membrane (the carnitine shuttle). Whether supplementation enhances fat loss in people with normal carnitine levels is not well supported.1
State of the evidence
Established for genuine carnitine deficiency; performance/fat-loss claims in healthy people are mixed.
Regulatory & status
Available as a supplement; a prescription form exists for deficiency.
For educational and research purposes only. This content is not medical advice. L-Carnitine is a dietary supplement / prescription for deficiency; not a treatment claim. Free Peptide University does not sell compounds.