Hey guys.... I'm coming up onto my 10th week on test E @ 600 and I have not been taking an Aromatase inhibitor (AI) but also have experienced very little sides. During week 6 I had planned to start taking my Aromatase inhibitor (AI) as I figured my estro would be high enough at that point. I took a weeks worth of exemstane 12.5 every other day and I felt absolutely horrible. I decided not to take it the following week and have kept on feeling great and getting stronger every week. At this point I am concerned tho that I should be or need to be taking an Aromatase inhibitor (AI). I have experienced no sides other than a lil acne and bloating, but nothing to lose sleep over.