Acetyl L Carnitine MRM Nutrition 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 Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota Metabolic clues could lead to potential treatment in complex critical illnesses University of Michigan Medical School