Guys, I've spent a good several posts in this forum explaining a theory or two why this could easily be the case.
Tren suppresses T3, which in turn suppresses dopamine. Dopamine regulates prolactin inversely so when dopamine decreases, prolactin increases. Estrogen combined with prolactin causes serious gyno issues as well as mood problems. Raise Test, and u u get higher estrogen combined with low dopamine levels from the suppressed T3. This is why I always suggest for safe measure to run a low dose of T3 with Tren, using a lower dose of Test in conjunction to maintain normal sexual health without the added estrogen issues. Having an AI on hand just in case is always a smart thing too.
U can run them both high or Test high and Tren low and still get results either way. Everyone is different for sure which makes figuring the dosing ratio out to be a bit tricky. With that said, I always find favor with the stronger binding androgen in any case, which is clearly Tren over Test.