L Carnitine and Weight Loss: Does This Fat Burner Really Work? Health Guide What is L carnitine, And How Does It Work? NF Sports When to Take L Carnitine for Optimal Training Benefits Transparent Labs Know About L Carnitine Injections for Weight Loss Should I use L Carnitine on rest days or just before workouts? 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