19-norandrosterone

19-Norandrosterone

19-Norandrosterone is a nandrolone and 19-norandrostenedione metabolite. It is created as a byproduct of nandrolone via the 5-alpha reductase enzyme and is on the list of substances prohibited by the World Anti-Doping Agency since it is a detectable metabolite of nandrolone which is an anabolic steroid. Consumption of androstendione products contaminated with traces of 19-norandrostenedione also results in testing positive for nandrolone. 19-Norandrosterone has very little if any anabolic activity on its own, but may be used as a prohormone to the weak anabolic steroid 19-nordehydrotestosterone that has only about 70% of the potency of testosterone in humans.