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 Amazon.com: Natural Factors, Acetyl L Carnitine 500 mg, Promotes a Healthy Memory, Concentration and Brain Function, 120 capsules (60 servings) : Everything Else L Carnitine L Carnitine 550mg + Vitamin B6+ Chromium Tablets HealthAid L Carnitine: The Energy Booster Your Body Loves Turn fat into fuel and power up your recovery with one of our favorite performance vitamins. Boosts metabolism & fat burning L Carnitine: Everything You Need to Know