PH are utter shite. Chemists played around to get outside the chemical space of schedule III AAS, and in the process made compounds ranging from significantly toxic to liver destroying. I ran epistane, one of the ostensibly mildest and most tolerable PH. Purchased from a reputable company (as reputable as PH companies were). After two weeks I felt like dogshit. After three weeks I literally was pissing brown and bruising by just brushing against shit. Toxic as fuck.
PH are now just as illegal as AAS in the US. The only reason for using them was to avoid the legal ramifications of AAS. Since they are now illegal, only a total dumbfuck would purchase them now (from, e.g., the U.K.).