When To Take L Carnitine to Maximise Your Shredding and Beyond BSc Supplements PDF) The Role of L Carnitine in Distance Athletes L Carnitine 1500 HEAT VMI Sports Thermogenic Fat Burner & Endurance Commonwealth Nutrition Taking L carnitine, will it improve endurance and recovery? 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