In the world of athletes, Proviron is used as an anti-estrogen, preventing or slowing the flavoring of other steroids. The result is comparable to Arimidex (though less effective), preventing the buildup of estrogen in the body. That unlike Nolvadex which only blocks the ability of estrogen to bind to certain receptors in tissues. Anti-flavoring method is preferable as more direct and effective combataerea estrogenic side effects. Another disadvantage of Nolvadex if discontinued too early effect of the risk of “yo-yo” estrogenic side effects can come back. Most use and Proviron and Nolvadex while they attacking the same problem from different angles yielding greater efficiency. The action of this steroid is androgenic no one you can turn into estrogen. In clinical use, Proviron is used to treat sexual dysfunction, which typically are the result of low levels of endogenous testosterone. It can reverse problems like lack of libido and impotence or even increasing the amount of sperm. Proviron does not stimulate the body to produce its own testosterone but adrogenic its oral substitute. Although it is strongly androgenic, the anabolic effect of this steroid is considered too small to increases in muscle mass. That is because it is easily converted into inactive metabolites as DHT (dihydrotestosterone).