Dianabol (Metandienone), also known as Dbol, is one of the most sought-after Performance Enhancing Drugs on the market, and for good reason Dianabol is one of the most highly effective Mass Building Steroids ever created, specifically for athletes to use to improve performance . It provides highly impressive weight and strength gains for most users. Experiencing a 3-4lb weight gain per week is not unheard of, especially in novices. .