How L Carnitine Helps with Fat Metabolism 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 Top 5 Benefits of CoQ10 and L Carnitine Combination for Athletes iThrive Essentials Meet L Carnitine a naturally occurring amino acid that plays a key role in helping the body convert fat into usable energy. It works by transporting fatty acids into your cells to Top 7 L Carnitine L Tartrate Uses for Fat Loss