Propecia will do absolutely nothing for helping hair loss on prohormones if that’s your concern. Remember all it does is block the 5 alpha reductase enzyme which convert testosterone to DHT.. prohormones for the most part are already Androgenic in their own state and don’t require the 5 AR enzyme to convert into a more Androgenic compound.. really the only compound finasteride will help with is testosterone.. go watch on YouTube Derek from “more plates more dates” and he just posted a video on finasteride. The dude is brilliant.. him and Greg doucette are by far my go tos when it comes to anything bodybuilding advice..