When Should You Take L Carnitine? MuscleTech GNC Total Lean Triple Stength L Carnitine Liquid Fruit Punch GNC 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 L CARNITINE increases muscle mass, reduces fat mass. Bangkok Hospital Headquarter L Carnitine Linus Pauling Institute Oregon State University