signOut STERIS PHARMA L arginine and Erectile Dysfunction: Uses, Side Effects, Benefits Allo Health Blog Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get The Fitness L arginine has two effects: it turns into nitric oxide and helps the body build protein. These effects give L arginine an array of potential benefits that range from heart health