Carnitine transport and fatty acid oxidation ScienceDirect L Carnitine is Underrated. New Meta Review Reminds Us Why. The Role of l carnitine in fatty acid transport and oxidation in Download Scientific Diagram 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. Nutritional and Hormonal Regulation of Citrate and Carnitine Acylcarnitine Transporters: Two Mitochondrial Carriers Involved in Fatty Acid Metabolism