Dianabol is a potent steroid which brings about noticeable side effects. Methandrostenolone is quite estrogenic in activity and gynecomastia is often a concern during treatment which can occur early on into a cycle. Water retention can also be a problem by resulting in a notable loss of muscle definition as both subcutaneous water and fat build up in and around the muscle. It is advisable to keep estrogen in check with an anti-estrogen such as Nolvadex and/or Proviron. Arimidex, Femara, or Aromasin (anti-aromatase) would be a better choice.