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 AAS 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. 
For bodybuilding beginners dosages of 200mg per week are usual. This is distributed in the first two weeks to 2 injections of 100mg every days. An injection of 200mg per week is then usual.
For advanced bodybuilders dosages of 200 – 600mg per week are usual.
Dosages of 1000 – 1600 mg per week can be found in the professional area. In the dosage range of more than 600mg / week you should consider increasing the dosage of other steroids since the side effects increase with Nandrolone Decanoat at doses over 600mg per week disproportionately.