I certainly couldn’t say anything with any measure of confidence - this is subjective, while the blood related info was cut & dry facts.
In my mind, if the doctor thought the script he was giving me was responsible for health markers that were not acceptable, he would be inclined to either lower the dose or discontinue therapy - not good. So I would want to blame it on something believable. But saying you added more testosterone is A. not legal and B. sounds like you probably should have known better. So if you admit to using RAD but don’t mention the extra test, and say you didn’t think it would affect you like that, it offers some explanation while also not being illegal or being a full admission to more obviously unacceptable actions.
“Well, I did start taking this SARM product I bought online, but it said it had no side effects so I didn’t think it would affect anything…should I stop taking that Doc?”