Levocarnitine, commonly known as L Carnitine, is a naturally occurring compound that the body produces from the amino acids lysine and methionine. It plays a critical role in energy production by transporting fatty L CARNITINE (LEVOCARNITINE) What is it? L Carnitine is a natural amino acid that helps the body turn fat into energy. How it works: Levocarnitine forces fat into the cells to Are L Carnitine and L Carnosine the Same? Anti Aging Systems American Regent Introduces Levocarnitine Injection, USP; FDA Approved, "AP" Rated, and Therapeutically Equivalent to Carnitor