I don't gain any weight but my body changes visually however I know some guys who gain like crazy on it, it's rare from what I can tell though but I remember a guy getting ready for nationals about five years and got pissed off cause he gained so much weight he missed his weight class,lol. But I don't ever hear of any big weight gains usually it's just a couple pounds of lean muscle that's keepable. I guess ur one of the lucky ones Brutha