Tren A 100, as it is often called, is both highly androgenic and anabolic. It is chemically unable to aromatize, and therefore produces no estrogen buildup. This, along with its high androgenic properties, makes the muscle produced by this drug very hard and defined. Tren A 100 first got its reputation when it was used in the legendary steroid, Parabolan. Users of this drug often noted dramatic results that were nothing short of amazing, and after it was unfortunately discontinued, the remembered effects of the substance gave it cult like status and the market was flooded with bunk Parabolan amps by those looking to profit off the extreme popularity and fan base that this steriod's incredible results had sparked. Tren A 100 was also used in cattle implant pellets, where the substance was used to increase the lean mass of the cattle, while reducing the fat on the animals. Kits became widely available on the internet allowing bodybuilders to convert these pellets into injectable solution.