L Carnitine Explained: What This Amino Acid Does for Your Body Ever heard of Acetyl L Carnitine? This amino acid is found in nearly all cells of the body. L Carnitine contributes to the production of energy from long chain fatty acids. And, it increases the activity Rexdrive Amino with L Arginine HCl, L Citrulline, Acetyl L Carnitine Arginate DiHydrochloride, and Glycine Propionyl L Carnitine (PLCAR) NO Artificial Fillers 120 Capsules Biolor Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn