In 2009, the committee of scientific experts of the Stockholm Convention concluded, "endosulfan is likely, as a result of long range environmental transport, to lead to significant adverse human health and environmental effects such that global action is warranted."  In May 2011, the Stockholm Convention committee approved the recommendation for elimination of production and use of endosulfan and its isomers worldwide. This is, however, subject to certain exemptions. Overall, this will lead to its elimination from the global markets. 
Interestingly, Trenavar and Trenbolone – also known as “Tren” – are so alike that cycling with this prohormone will actually lead to the stimulation of the naturally active trenbolone in the body, leading to greater vascularity, faster loss of fat as well as considerable boosts in size and strength. This is because Trenavar targets the 17b-Hydroxysteroid dehydrogenase type 1 (17b-HSD1) when it gets metabolized by the body. As soon as the compound of Trenavar gets hydrogenated inside the system, its conversion into Trenbolone takes place.
Trenbolone is often touted as an anabolic steroid that has ‘harsh’ side effects and tends to frighten many individuals who are considering the use of this compound. First and foremost, it should be established that because Tren does not aromatize into Estrogen at any dosage, there is no risk for encountering Estrogenic side effects . The Trenbolone side effects of particular concern are its androgenic side effects, and other side effects that are not usually seen with any other anabolic steroids (such as insomnia, excessive sweating, etc.).