Supplements don't replace the workbut they can support it L Carnitine helps your body turn fat into usable energy, so you can push harder and recover better. Consistency first. Supplements second. Results Carnitine: the claims and why it may not work Carnitine increases endurance performance? What Is L Carnitine? How Does It Work? L Carnitine vs L Arginine: Understanding Their Differences and Benefit Fitness Health