I think you are both right in a way. Mast acts as an ANTI-estrogen in its effects without being a strictly defined inhibitor of aromatase.
Yes. With no disrespect to anyone here, it’s fairly well established anecdotally that drostanolone competes well with estrogen. I am not aware of any actual AI properties, but it’s essentially fact that when you use Masteron you can often get away with less AI to prevent gyno, as well as hold less water. Same as if you took some Proviron or Epistane, or Winstrol.
OP, I have only used EQ at 1:1 with testosterone last cruise, 120mg of each. By week 7 I dropped it because I was having low estrogen sides AND aggravation of my gyno, and my bloodwork revealed elevated hematocrit, rbc, and lipids with very low E2 based off an Ultra-sensitive Estradiol test on my panel.
The THEORY that MPMD has put forth, based on anecdote, that seems to completely hold up with my personal experience, is that EQ successfully out-competes testosterone largely for the aromatase enzyme, so less testosterone gets converted to Estradiol and more EQ becomes some other estrogen metabolite. But if you don’t get the ultra-sensitive assay like I did, you would see elevated estrogen levels instead of crashed e2. So you get some estrogens, but not the kind you need to maintain cardiovascular and joint health, and maybe not even libido.
If you were like me, you would probably need to run 4:1 test:eq to get away with it, but at that point it’s probably smarter to just not use it and find something you do better on.
As far as the guys saying you need to run 600+, my assumption is they’re probably leaning on the trace conversion to DHB. You know how it goes; some guys are satisfied with the gains they get on a few hundred mg and some guys feel they need to run grams and expect massive changes. And everyone does respond differently, in their defense.