Fat to Energy LemonAid® is a unique combination of L-Carnitine tartrate (a natural fat-burner) and D-Ribose powder with a refreshing Lemon flavor and no artificial stimulants. L-Carnitine is a natural fat-burner and helps keep your body from storing fat. How? L-Carnitine transports fat absorbed from your meals into the mitochondria of the cells, to be burned up as energy instead of being stored as fat. If you are looking to get lean, increase your energy and support muscle building then this is the amino acid combination you need.