L Carnitine vs CLA: Which Non Stimulant Fat Burner Fits You? Read the caption Most people believe steroids, fat burners, or L Carnitine melt fat. The truth is different. Steroids mainly increase muscle protein synthesis and help maintain muscle mass, but they do Carnitine: the claims and why it may not work 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