Carnitine is a naturally occurring dipeptide synthesized in the liver and kidneys from the essential amino acids lysine and methionine. The “L” in L-carnitine refers the biologically active form of the molecule which helps with the transport of fatty acids into the mitochondria where they are broken apart to produce energy. Unbeknownst to many, “burning fat” is actually a two-step process. Step one involves the liberation or release of fatty acids from fat cells into the bloodstream while step two involves the transport of fatty acids from the blood into the cytosol of an energy consuming cell and across the mitochondrial membrane. Importantly, the degree to which fat is “burnt” correlates directly to the degree of energy demand and the speed with which fats can be transported into, broken down and oxidized in the mitochondria. Poor fatty acid transport or low numbers of mitochondria = poor fat burning ability and a consequential reliance upon carbohydrates for fuel.