Nobody really knows how proviron works. It's shown that it has some affinity for aromatase, but I haven't seen anything to prove it is an anti aromatase. There is also debate over whether or not proviron will suppress HPTA. Those that have used it, know that it does reduce water retention....somehow. It does help libido....somehow. It's simply 1 methyl DHT.
If someone has good info on it, I'd like to see it. So much is speculative.
I can't argue with the actual results...I just am not sure exactly how those results come about.