Thorne Research L Carnitine L Carnitine Supplement The Natural Athletes Clinic Liquid L Carnitine Energy, Metabolism & Fat Burning L Carnitine Shots are ampoules containing liquid L Carnitine. How Much L Carnitine Should I Take? A Guide The Science of Good Health 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