The side effects of Proviron will include the suppression of natural testosterone production, but it’s not as cut and dry compared to many steroids . The use of anabolic steroids, any anabolic steroid will suppress natural production; however, the rate of suppression varies greatly from one steroid to the next. In the case of Mesterolone, the total rate of suppression can be so minimal it can be insignificant. With standard Proviron doses, which normally fall in the 50-150mg per day range, the total suppression of natural testosterone production should be minimal of relatively no concern. When the dose surpasses the 150mg mark this will create a greater level of suppression, but there is no reason for any man to need a dose greater than 150mg per day. In theory, assuming your natural testosterone levels are in the high end optimal range, the individual could implement a cycle of Proviron and a moderate suppressive steroid at a low dose such as Anavar and forgo the need of exogenous testosterone supplementation. However, the Anavar dose would need to be very low and natural levels very high. Most men will still need exogenous testosterone, especially when we consider standard anabolic steroid cycles .
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.