L-arginine is so effective simply because it will help with the release of nitric oxide. Reduced ranges of L-Arginine can lead as a result to decreased libido. We always seem to wonder at some point in us as to why we are the way that were. Why do we behave in a very certain method that others don't? Why is it that I and my sibling or my best friend has different likes, choices and hobbies? And most importantly, exactly why are we different from the other person in any way? Next big passion killers are - drugs, cigarettes and alcohol. Cut down or even better stop altogether.