L Carnitine helps shuttle fatty acids into the mitochondria (the power plants of your cells) where they can be burned for energy. It's often used in fat metabolism and energy support formulas. The Importance of the Fatty Acid Transporter L Carnitine in Non Alcoholic Fatty Liver Disease (NAFLD) Carnitine Molecule of the Month September 2003 Fatty acid transport into mitochondria by carnitine transporter Pyruvate supported flux through medium chain ketothiolase promotes mitochondrial lipid tolerance in cardiac and skeletal muscles: Cell Metabolism L Carnitine is Underrated. New Meta Review Reminds Us Why.