So Iím looking for any research that supports the fact that mast can help E related side affects. I looked at some stuff regarding its use in breast cancer patients but no solid facts saying this is the how and why for keeping estrogen down. I just started using it on a dbol ,eq,test stack as a way to combat e sides which I donít get to much if at all but most other ais at a eod dodge gets me too low and I want to be a little more on the mid high range this cycle. But all in all mast has seemed to keep e down a bit with just the way I am feeling with it ran low dose currently.