Carnitine: the claims and why it may not work Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis Most people use L Carnitine wrong. They take it alongside a high carb diet expecting it to burn fat. Biologically, thats almost impossible., L Carnitine is an amino acid derivative that transports 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