Oral Tren, also known as Tbol, Oral Turinabol, Oral Tbol, and 4-Chlorodehydromethyltestosterone, is an oral anabolic-androgenic steroid (AAS). It is a derivative of Dianabol (Dbol), but it does not aromatize into estrogen. In fact, it produces slow, quality gains with less side effects than Methandrostenolone.