Nandrolone is (presumedly) naturally found in humans in miniscule amounts, therefore there is a low threshold, correct.Many wrongs in your post. Nandrolone is to be found natural in humans. Nandrolone is a testosterone derivative... Read it again.
Nandrolone (and every steroid since Dianabol) is a testosterone derivative, correct.
But I read it again. Despite using the term "steroid" and "testosterone derivatives" etc, it is about how microdosing testosterone affects T/E ratio (usually 1:1) so little that most of the microdosing with T goes under radar. The premise of the article is summarised in the following sentence:
"But testosterone microdoses may escape regulators' radar because they only stay in the system for minutes or hours."
Nothing about "real" steroids that (if anything) lower T/E-ratio by suppressing thd production of natural testosterone. I get the impression that the author doesn't know that testing anabolic steroids in urine has nothing to do with the T/E - ratio.