Why even consider an nandrolone if your going to be tested?
If you’ve already used it and are trying to get it out of your system then I’d consider going on a total cleanse/cutting diet if you have a few months before the test and then going on a bulk during the testing time. Perhaps you could shed off enough body fat to “burn off” the stored nandrolone. Supplementing with extra fiber and calcium-d-glucarate will help your digestive track clear the hormones/metabolites out. But really... this is all theory.
Id say NPP - Nandrolone PhenylPropionate - - Nandrolone PhenylPropionate - could be cleared from the system in 6 months… its not very lipophilic at all. Theoretically, Deca-Durabolin - nandrolone decanoate - could store in your BF for years (maybe a lifetime)… especially if your continuously getting fatter after your cycle which would decrease your chance of flushing out the Deca from the fat tissue.
-Pp