L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute L Carnitine for Erectile Dysfunction: What the Evidence Shows and Practical Considerations 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