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 L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians L carnitine benefits, uses & dosage: A complete guide PDF) The Role of L Carnitine in Distance Athletes