Carnitine Injection Infusion Iv Im Drip Stock Vector (Royalty Free) 2334499873 Shutterstock 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 Muscle Specific Deletion of Carnitine Acetyltransferase Compromises Glucose Tolerance and Metabolic Flexibility: Cell Metabolism L Carnitine Injectable Factor Health MD