The Importance of the Fatty Acid Transporter L Carnitine in Non Alcoholic Fatty Liver Disease (NAFLD) Effects and mechanism of L Carnitine on weight loss L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe Hepatic Carnitine Palmitoyltransferase (CPT) System: Gateway to Fatty Acid Oxidation Long chain fatty acids cannot directly cross the inner mitochondrial membrane. The hepatic carnitine shuttle system, led by CPT I and From brain to muscle, L Carnitine plays a key role in energy metabolism, endurance, and recovery by supporting efficient fat to energy conversion.