L Carnitine is Underrated. New Meta Review Reminds Us Why. Fast&Up L Carnitine 3000 mg Triple Action Formula for Faster Fat Burn Does L carnitine cause erectile dysfunction? Acetyl L carnitine for erectile dysfunction L Carnitine Benefits for Male Erectile Dysfunction 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