Proviron, or mesterolone, is a popular antiestrogen used by bodybuilders. It acts as an antiaromatase, which means it prevents the aromatization of steroids into estrogen. Proviron is frequently used by athletes on heavy cycles of steroids to prevent gynecomastia. It is also favored by competitive bodybuilders since a lower estrogen level corresponds with increased muscle hardness and lower water retention.One or two 25 mg per day should be sufficient to prevent gynecomastia. Proviron can also be combined with Nolvadex (tamoxifen citrate) if needed. Side effects are extremely rare with dosages under 100 mg per day. One major problem with Proviron is that it tends to reduce the gains made from a cycle. This is due to the fact that Proviron is an androgen and therefore binds to androgen receptor sites within the body. With Proviron binding to androgen receptor sites, the other steroids present in the body (androgens) are blocked out and unable to take effect. Consequently, many athletes prefer to keep the intake of Proviron at its minimum effective dosage in order to make sufficient gains while still preventing gynecomastia. Proviron is usually fairly easy to obtain on the black market. Most versions are manufactured by Schering and cost about $1-$2 per 25 mg tab. Proviron can come in push-through strips or small glass vials. There is currently no need to worry about authenticity when buying Proviron since no counterfeits of this product are known too exist |
