Sustanon is a blend of 4 testosterone esters (propionate, phenylpropionate, isocaproate and decanoate). It was originally manufactured for the treatment of hormone replacement therapy (HRT). It was though that because of the various ester rates, the release of testosterone would suit the user. This, though, wasn’t the case in full. Because of the short and long acting esters, hormone levels were very uneven, causing the user side effects, such as acne, libido problems, gynecomastia and water retention. It is still used as a form of HRT for males and also given to individuals with muscle wasting diseases. Bodybuilders who buy Sustanon and have been using this compound for years means it’s liked by many and hated by some. Some users can tolerate the fluctuations in blood plasma concentrations, other cannot. It is a testosterone derived steroid that “kicks in” faster than its counterparts, Enanthate, Cypionate, because it contains 2 relatively fast acting esters. Because of this it is popular for offseason cycles and during pre-contest phases and buying Sustanon is extremely popular. Users who buy Sustanon can cause a host of side effects, including and not limited to, hair loss, gynecomastia, water retention and increased blood pressure, compromised lipid profile, acne and in women virilisation. It will also shut down the bodies own testosterone levels when used. You should also buy Sustanon from trusted sources as its one of the most counterfeited steroids out there available on the black market. It can still be obtained legally through prescription in some countries.