Dianabol, also known as Dbol, is an anabolic steroid that is used to increase muscle mass and strength. It works by stimulating the production of testosterone in the body, which leads to an increase in muscle growth and strength. Dianabol is a controlled substance and is illegal to use without a prescription in many countries. The use of anabolic steroids can have serious side effects, including liver damage, high blood pressure, and an increased risk of heart attack and stroke