L-Carnitine is a natural substance found in most body cells particularly the muscle, neural tissue, brain, and heart. One of the major functions of L-carnitine supplementation is for fatty acid oxidation that can help users’ burn fat in the body. Fatty acids are amongst the main energy sources the human body utilizes and oxidation is the course by which they're broken down to produce energy. L-carnitine aids the body produce energy. It is necessary for heart and brain function, movement of the muscle, and many additional body processes.