Nandrolona D which often called Deca-Durabolin is one of the most popular steroids used amongst bodybuilders. Deca is a low androgenic steroid with powerful anabolic effect. It aromatizes in high dosages, but not at the rate of testosterone. Progesterone buildup is one side effect that might occur. This steroid can be used for cutting or for bulking. The joint relief and healing that Deca provides is one of the main reasons it became a popular steroid among Bodybuilders.