How Does Carnitine Work to Burn Calories? The Science of Carnitine: How It Works and Why It Matters 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 Top 5 Benefits of CoQ10 and L Carnitine Combination for Athletes iThrive Essentials L Carnitine