Clinically-studied Vitaline L-Carnitine contains pure L-carnitine, the naturally occurring form that's found in food and synthesized in the body. Much of the body's L-carnitine is found in the heart and skeletal muscles that rely on fatty acid oxidation for most of their energy. Nearly 70% of the energy needed for heart function is derived from fatty acid breakdown. Vitaline L-Carnitine transports fatty acids into the mitochondria of the cells, where it is burned for cellular energy.