Trenbolone Enanthate has to be injected once a week, making it user friendly. It always has to be combined with Testosterone to limit psychological side effects. Adding Masteron will shift the focus even more to gaining dry muscle mass. Trenbolone is unique because it has the same or more ability to build muscle mass as Testosterone, but without the water retention and gynecomastia. Trenbolone can never ever be used together with Deca or NPP because a nasty form of gynecomastia may occur.