I have some existing Gyno that is not noticeable but there is tissue beneath the nipple. I got it from some bunk Exemestane I got about 5 years ago. Anyways certain compounds almost immediately flare it. I tried running Tren Ace for my contest prep and literally 24 hours after first shot it flared up. I tried NPP and it usually took about 3 shots to have the tissue irritated. I hav erjns bloods and my Estrogen was low as well and I tested for prolactin and it was range. I have read every thread possible about Gyno. I am convinced some people are just super prone to it and once the tissue is formed certain compounds directly antagonize it. Anadrol does the same thing as well. I can run test, Primo, Mast at almost any dose and have no problem. Same goes for Tbol, Var or winny. I really want to get the surgery so I can have more options available.