L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe The Right Way to Take L Carnitine to Boost Your Training What is carnitine? Carnitine is produced in the body from the amino acid lysine and naturally occurs in some foods. It supports energy metabolism and muscle function, which are important factors in Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation Full article: Acetyl L carnitine: from a biological curiosity to a drug for the peripheral nervous system and beyond