So I went to see my doc this morning to get my test and e2 levels checked (currently on test and tren cycle and had some ED issues the other night). He was saying the way they do the tests now its possible that it wouldnt pick up exogenous test if the molecule is different enough. But I though synthetic test is identical to endogenous test. Could it be possible he was thinking of testosterone derivatives (other steroids)? I asked this and he said no. Thoughts?