There are many steroids that crossover into two categories as both effective muscle building steroids and cutting steroids . All four of the steroids mentioned so far can fill this role with testosterone being more efficient for both roles than the other three. Beyond testosterone, a true diverse anabolic steroid , the king of the realm regarding this crossover effect is that of Trenbolone . The various Trenbolones are some of the best muscle building steroids we can use and they are some of the best cutting steroids we can use as well. The same stack mentioned above can be used with Trenbolone, replacing the Deca with Tren.
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.