I am taking tren ace, test prop, eq, winstrol and masteron at about 100 mgs everyday of each compound except winstol runing that at 80mg,I have had a few pimples but a week out from the contest my skin is flawless. on the other had a guy that im competing against is on pretty much the same coupound and is broken out all over his shoulder and back pretty nasty looking. So to awnser your question if your not prone to acne you might get a couple of blemishes but you will be better off than somebodywho is prone to acne.