How Much L Carnitine Per Day: Expert Guide The Science of Good Health Losing weight with L carnitine supplements. Yes or no? L carnitine 15ML (25minutes before workout), Pre workout 25minutes before workout 1 recommended scoop ., Step 1 : Add L carnitine supplements before workout, Step 2: Add cardio after workout 15 30 Creatine Vs Carnitine Which Pre workout Supplement To Choose? AS IT IS Nutrition 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