I seriously can't follow what some of you guys are even saying anymore. Here's what I stated, nandrolone can cause a false "testosterone" reading. Testosterone, not estrogen or whatever. This happens with certain test methods, test as in testing not testosterone. Jesus.
OP got gyno, ok so what that doesn't mean his estro was super high. Could mean slight estro rise and large prolactin rise, from nandrolone. This is why I said I didn't believe his nandrolone was testosterone. He was basing this based off of sides and what he read. Nothing I saw proved his nandrolone was testosterone.
Tren can cause a false estrogen reading for instance. Again, it depends on the testing method used. If I recall correctly, LC/MS-MS is the more accurate method. I have had bloodwork that included two both tests methods for the estrogen and they varied even on testosterone only. Testing methods have to be taken into consideration. Blood tests are a crude way of testing legitimacy of a product.