Acetyl L Carnitine 500 mg, 100 capsules Life Extension Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn 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 Vitamins, Minerals & Supplements Nutrients Andrew Weil, M.D. L Carnitine in the Treatment of Psychiatric and Neurological Manifestations: A Systematic Review