Women bodybuilders are also fond of this substance, where it’s mild androgenic nature makes it a safe steroid for them to use without fear of masculizing side effects. Deca will shut down one’s body’s ability to make it’s on natural testosterone, therefore a proper PCT program is recommended following a cycle of this substance. Male bodybuilders often use Deca (Nandrolone Decanoate) in doses of 400-600mgs a week for 8-12 weeks, while women find a dosage range of 50-100mgs weekly to be sufficient for seeing desired results.
Heavy consumption of the essential amino acid lysine (as indicated in the treatment of cold sores) has allegedly shown false positives in some and was cited by American shotputter C. J. Hunter as the reason for his positive test, though in 2004 he admitted to a federal grand jury that he had injected nandrolone.  A possible cause of incorrect urine test results is the presence of metabolites from other AAS, though modern urinalysis can usually determine the exact steroid used by analyzing the ratio of the two remaining nandrolone metabolites. As a result of the numerous overturned verdicts, the testing procedure was reviewed by UK Sport . On October 5, 2007, three-time Olympic gold medalist for track and field Marion Jones admitted to use of the drug, and was sentenced to six months in jail for lying to a federal grand jury in 2000.