Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis How L Carnitine Helps with Fat Metabolism 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 L Carnitine: Benefits, Uses, Side Effects, and More L CARNITINE increases muscle mass, reduces fat mass. Bangkok Hospital Headquarter