Carnitine: the claims and why it may not work 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 Benefits of Acetyl L Carnitine Simply Supplements Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications The intestinal microbial metabolite acetyl l carnitine improves gut inflammation and immune homeostasis via CADM2 ScienceDirect