Turinabol 10 is an oral tablet holding 10 mg of 4-chlorodehydromethyltestosterone, a chlorinated relative of methandienone first produced in East Germany in the 1960s. The chlorine atom at carbon four closes off the route to estrogen, so the compound has no estrogenic activity of its own.
Alpha Pharma packs 50 tablets. Being 17-alpha-alkylated, the molecule survives first-pass metabolism well enough to work taken by mouth, the same structural trick that makes orals of this class a subject of hepatic caution.
