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. Carnitine Metabolism and Its Role in Fatty Acid Oxidation Creative Proteomics Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health The Carnitine Shuttle Cytosol Mitochondrial Fatty Acid Transport