L Carnitine vs Acetyl L Carnitine: Key Differences 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 Acetyl L Carnitine L Carnitine vs Acetyl L Carnitine: Which is Better L Carnitine Injections: A Clinical Guide for Practitioners National Medical Resources Inc