Acetyl L Carnitine Mark Hyman, MD L Carnitine Benefits for Male Erectile Dysfunction: What the Evidence Shows 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 Bioclinic Naturals Acetyl L Carnitine 120Vc Natural Chemist Acetyl L Carnitine Force Factor