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 L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe Vitacost Acetyl L Carnitine HCl 500 mg 300 Capsules Vitacost