PCT is to get your male sex hormones back on track, producting natrually, after you come off of a cycle. Steroids are testosterone or test related and shut down your natural production. Clen is not a steroid, so there is no need for PCT. Sounds like you need to do a lot more research to understand some of the very basic info about the drug you are considering. Take some time and read up on clen, so you can understand how it works and how to get the most out of it. Remember that clen alone is not going to get you ripped. It will however push you that much further with the right diet