Improving diagnosis of mitochondrial fatty acid oxidation disorders European Journal of Human Genetics Mitochondrial control of fuel switching via carnitine biosynthesis Science Fatty Acid Transport an overview ScienceDirect Topics 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. L Carnitine is Underrated. New Meta Review Reminds Us Why. Carnitine transport and fatty acid oxidation ScienceDirect