Carnitine: the claims and why it may not work Amazon.com: PURE ORIGINAL INGREDIENTS L Carnitine L Tartrate, 3 oz, Always Pure, No Fillers or Additives : Health & Household When to Take L Carnitine for Optimal Training Benefits Transparent Labs L Carnitine Tablets for Energy Support Nature's Bounty 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