Carnitine Shuttle an overview ScienceDirect Topics Frontiers Carnitine Traffic in Cells. Link With Cancer Mitochondrial control of fuel switching via carnitine biosynthesis Science Role of carnitine in disease Nutrition & Metabolism Springer Nature Link 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.