Proviron is used to supplement DHT. It's good for libido, muscle hardness, lowering estrogen (to a certain degree) just to name a few off the top of my head. It's pure DHT in a pill so remember that. Some love DHT and some try to avoid it. I prefer Masteron for some reason it's easier on my Prostate than Proviron.
Am 196 with 15% BF , goals are to get to 280-175 cut but also looking a bit bulky hats why i added the NPP. Also taking adex as well as prami. I am 32 y/o. Everything doing awesome Maybe some drop in libido.
I don't see a problem with it but I would run them even. My guess is estrogen or prolactin is high. It's just speculation without bloodwork. If Proviron or Mast doesn't help and your libido gets worse do mid cycle bloodwork to find out what's causing your problem.