Yeah it improved a lot after 4-5 weeks of Arginine(though it had improved and without it, but the arginine surely boosts the process). I tell you guys .. I even masturbated 4 times the week because I feel fine .. and guess what - no more firm flaccidity. However I will stop this habit(masturbation) again because I feel that it is not right anyway(I was just checking the penis out). This stuff is a life-saver.