I always run an AI or my estrogen gets too high. I can have blood pressure issues when my RBC count is elevated too. Some don’t need an AI, most do, which is why it’s part of the standard TRT protocol. Personally, I’d rather take and AI and keep my Testosterone fully dosed. It’s also possible that you see an elevation in blood pressure becasue you’re 52 and you have a predisposition to HBP, which would have happened anyway. You wouldn’t be the fist to have to start watching salt intake, etc. as you age. To answer your question directly, I haven’t seen high estrogen as a cause of HBP.