It's not BS Nandrolone can give a false read on testosterone levels on certain types of testing.That was the first I ever heard of it too. But the debate was on depending on the blood testing methods, the npp gave a false reading. Meaning the testosterone levels weren't elevated but that the testing method reads npp as testosterone (much like tren shows up as estrogen depending on blood test sensitivity)
It may have been bs. I couldn't find any information on it when I searched.
mands