Oh yea, estrogen is a problem. If i bump my test dose over 150mgs i get acne even with and ai. Ive been running a low dose of tren-a and havent got one zit from it because it doesnt convert to estro. And yes my tren is legit, its gmp fda approved trenabolic from wp. Cant sleep and sweat all day long. Not saying you wont get acne from tren but in my case i dont.