I drank green tea for other reasons, originally. My job is cold and I drank hot green tea to warm me up a bit. At that time I was having major hot flashes, night sweats, etc. I did notice after I drank it in the afternoon, I did not have any hot flashes for the rest of the day. Then after several months, I wrote a friend and she recommended green tea. I had already been drinking it for several months with no improvements(for all day), although I did notice improvements in the endometriosis. It took probably a year before I noticed a real change. I don't know if the tea really finally took hold, or if it would have happened anyway..