im wondering which one it is. my test levels are always towards the top of the scale, even on 80 mg a week. i tried letro at like a quarter tab of 2.5 mg 2ce a week, and it was higher for a while but libido down now. im thinking going back to aromasin? or arimidex? which one wont put down IGF? cuz we all know we need that for muscle growth.