Dianabol is a synthetic anabolic-androgenic steroid (AAS) and is based of testosterone. It was first created to treat medical conditions, but researches quickly discovered its’ muscle building effects, so it instantly became popular amongst bodybuilders. Metandienone was developed in 1957 and marketed for sale in Germany and USA. It quickly became the first most popular muscle building steroid.

Many successful athletes have admitted to using the drug before it was banned,this includes the bodybuilding icon Arnold Schwarzenegger.