Turinabol or T-Ball, is a derivative of Dianabol. It is designed to work without causing water retention or estrogenic effects. As a 17-alpha alkylated steroid, however, it can be toxic to the liver. Users of T-Ball experience slow, steady gains that give the muscle a defined look probably because of the lack of water retention. It has made its way back into popularity today, probably because if its low health risks and quality muscle mass it produces.