This compound belongs to the class of organic compounds known as androgens and derivatives. These are 3-hydroxylated C19 steroid hormones. They are known to favor the development of masculine characteristics. They also show profound effects on scalp and body hair in humans. The value of Δ5-diol as a radiation countermeasure is based mainly on its stimulation of production of white blood cells and platelets. Androstenediol used by the body to make testosterone and estrogen. There is some concern that androstenediol might increase the risk of coronary heart disease. There is also developing evidence that androstenediol might help prostate cancer cells grow. Taking androstenediol along with estrogen and testosterone pills might cause too much estrogen or testosterone in the body.