Experts weigh in on which vitamins to toss back or toss out CNN.com L Carnitine, 500 mg, 60 Vegetarian Capsules Spring Valley Acetyl L Carnitine HCl and Alpha Lipoic Acid Dietary Supplement, 50 Count HSA FSA Eligible Walmart.com 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 Fumarate with Biosint Carnitine, 60 Veggie Caps (500 mg per Veggie Cap) L Carnitine Liquid 450ml, Green Apple Flavor Vedix Life