Meet L Carnitine a naturally occurring amino acid that plays a key role in helping the body convert fat into usable energy. It works by transporting fatty acids into your cells to L Carnitine for Fat Loss: Does It Actually Burn Fat? (Canada) When To Take L Carnitine to Maximise Your Shredding and Beyond BSc Supplements L Carnitine is not a magic fat burner It won't melt fat, build muscle, or replace hard work. The only thing it burns is your money Stick to the basics Carnitine: the claims and why it may not work