Carnitine Shuttle Purpose and Mechanism Role of Carnitine Shuttle System in the Active Transport of Fatty Acyl Coa into the mitochondrial Carnitine transport and fatty acid oxidation ScienceDirect 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 Science of Carnitine: How It Works and Why It Matters