L-Carnitine, a derivative of amino acids, is found in nearly all body cells. Its main role is to turn fat into energy by assisting in the transport of fatty acids into the mitochondria, the energy powerhouses of our cells. Under normal circumstances it is produced by our bodies. However, ageing causes a decline in the production of cell energy. Acetyl-L-carnitine is a form of L-carnitine that helps to decrease effects associated with ageing. Acetyl-L-carnitine and L-carnitine are absorbed into the bloodstream efficiently. Both of them are effective at promoting the burning of fatty acids for energy production and being efficiently used by cells. Acetyl-L-carnitine also crosses the blood brain barrier and guards against oxidative damage and against toxins, like Amyloid-beta peptide, in the brain. This form of carnitine may support youthful memory function, improve mitochondrial structure and function, inhibit age-related oxidative damage and restore the activity of key enzymes.