In 2010, the Natural Resources Defense Council forced the FDA to review triclosan after suing them for their inaction. Because the FDA prohibited hexachlorophene , a compound similar to triclosan, Halden and others argued that the FDA should also ban triclosan.  On December 17, 2013, the FDA issued a draft rule revoking the Generally recognized as safe status of triclosan as an ingredient in hand wash products, citing the need for additional studies of its potential endrocrine and developmental effects; impact on bacterial resistance; and carcinogenic potential. 
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.