Mast does not lower estrogen at all. It does alleviate symptoms of higher estrogen. So in theory it allows you to have a higher e2 without noticing....
Masteron does not act as an AI. However it will alleviate some high estrogen symptoms, like bloating. In reality it allows your estrogen to creep up...
I'm not sure how I missed this but thanks. It's getting even better. I will say my pecs are starting to disappear. Need to get back to training them...