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 arginine l carnitine l lysine SteelFit Abs of Steel Maximum Definition Cream L Carnitine vs Acetyl L Carnitine: Key Differences Item L carnitine biosynthesis. Public Library of Science Figshare L Carnitine Injection Levocarnitine IV