Is Acetyl L Carnitine Good for Your Mental 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 Acetyl L Carnitine Supplement (ALCAR) 500 mg Superior Labs L Carnitine L Carnitine benefits The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link