Originally posted by tanto
i disagree about proviron use as a antiestrogen,either aromatase inhibitor or estro blocker
IMO it does have place as a hardening agent,but no antiestrogen
Well, we are all entitled to our opinions, but the fact is that it DOES work as an anti-estrogen. I have been using Proviron for two cycles now, quite successfully. Proviron is an estrogen inhibitor similar to Arimidex; it's not an estrogen blocker like Nolvadex.

It's fine stuff and I personally think it's under-appreciated by BBers in general. For me, I get the same results as Arimidex at 1/4 of the cost.

From the AR Drug Profiles section:

You should be aware that Proviron is also an estrogen antagonist which prevents the aromatization of steroids. Unlike the antiestrogen Nolvadex which only blocks the estrogen receptors (see Nolvadex) Proviron already prevents the aromatizing of steroids. Therefore gynecomastia and increased water retention are successfully blocked. Since Proviron strongly suppresses the forming of estrogens no re-bound effect occurs after discontinuation of use of the compound as is the case with, for example, Nolvadex where an aromatization of the steroids is not prevented. One can say that Nolvadex cures the problem of aromatization at its root while Nolvadex simply cures the symptoms