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. How carnitine transporters boost reproductive health Nutritional and Hormonal Regulation of Citrate and Carnitine Acylcarnitine Transporters: Two Mitochondrial Carriers Involved in Fatty Acid Metabolism Role of Carnitine Shuttle System in the Active Transport of Fatty Acyl Coa into the mitochondrial Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health History of L carnitine: Implications for renal disease Journal of Renal Nutrition