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 Supplements and chronic pain: What does the research say? Some studies suggest possible benefits for: Acetyl L Carnitine (energy for cells; studied in diabetic nerve pain) Alpha Lipoic Acid (antioxidant; may ease nerve pain, L Carnitine, 500 mg, 30 vegetarian capsules Life Extension Fast&Up L Carnitine 3000 mg Triple Action Formula for Faster Fat Burn L Carnitine Linus Pauling Institute Oregon State University Carnitine: the claims and why it may not work