Masteron is an androgenic/anabolic steroid which was first released in 1959. Masteron is structurally a derivative of dihydrotestosterone, and as such, will exhibit strong androgenic effects. It is most commonly used by bodybuilders during cutting cycles when water retention is a concern. Masteron is also appreciated by many athletes for its strong anti estrogenic properties, which can be beneficial during on cycle support when aromatase inhibitors are not being used. Masteron has a relatively short half-life of 2-3 days, so frequent administration is necessary to maintain optimal blood concentrations.