A lot of you guys say not to use this shit, but I have to disagree. Now, don't get me wrong, people like Valentino are assholes, but if you are competing and have a lagging bodypart that just won't grow, Synthol is a good option. I know a few pros who say that most, if not all, IFBB pros and top NPC competitors use synthol in one way or another. I don't recommend using this stuff unless you are serious about competing and really need it.