L Carnitine: 3 Ways Physique Pros Use This Fat to Fuel Powerhouse SteelFit USA 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 Can L Carnitine Improve Fat Loss? Uncle Gym's Advice Creatine Vs Carnitine Which Pre workout Supplement To Choose? AS IT IS Nutrition L Carnitine doesn't magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and you'll feel the difference @Marybosch shows us how L Carnitine will boost your Carnitine, Boost Your Energy, Weight Loss and Health Uses.