NutraBio L Carnitine 3000 Green Apple 16 fl oz (31 Servings) GNC L Carnitine 3000 Liquid 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 Carnitine: the claims and why it may not work Carnitine: the claims and why it may not work Healthvit L Carnitine L Tartrate 500 mg Supplement