The Marathon L Carnitine helps the body turn fat into energy. If your plan is to use this supplement to optimize energy during your workout, it's best to take it prior to Monster Juice Voodoo Grape Energy Drink L Carnitine vs Fat Burner Which Is For You? L Carnitine doesnt magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and youll feel the difference @Marybosch shows us how L Carnitine will boost Do You Know How Long It Takes L carnitine To Start Working? Plix L Carnitine, Mixed Berry, 12 fl oz (360 ml)