The Mesterolone hormone is not estrogenic. It does not aromatize and it carries no progestin nature. As a result, the side effects of Proviron will not include any related effects such as gynecomastia or excess water retention. Such adverse effects are impossible with this steroid. This will also greatly reduce the risk of high blood pressure as high blood pressure associated with anabolic steroid use is often due to extreme water retention. In fact, Proviron should provide an anti-estrogenic effect by preventing testosterone to estrogen conversion or at least tremendously slow it down.
As for the good, the DHT from a proviron cycle is a pure androgen, but unlike testosterone , DHT doesn’t cause any water retention. DHT is what makes muscle “hard.” And it lowers SHBG (Sex hormone Binding Globulin) which prevents estrogen from forming. By preventing estrogen from forming, DHT can be used to prevent the aromatization of other steroids. This means that the DHT from a proviron cycle can keep steroids in the testosterone family from converting to estrogen and causing in men estrogen related side effects like gynecomastia. DHT also contributes to erectile rigidity. All good stuff! There are drawbacks however, most notably prostate hypertrophy and hair loss. So one may say DHT is pure maleness.