Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get Losing weight with L carnitine supplements. Yes or no? Carnitine: the claims and why it may not work L Carnitine Linus Pauling Institute Oregon State University L Carnitine 500 mg Supplement Energy and Fat Metabolism Support Best Time to Take L Carnitine: Morning vs Evening for Better Fat Loss & Performance