L Carnitine Benefits for Male Erectile Dysfunction L Carnitine and Male Fertility: Is Supplementation Beneficial? 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 Acetyl L Carnitine Alpha Lipoic Acid Erectile Dysfunction: What the Evidence and Experience Actually Show Acetyl L Carnitine Alpha Lipoic Acid Erectile Dysfunction