Having read up on things that contribute to 'hot flushes' .. I find out caffeine is a trigger. So, I look in to decaf & find that decaf coffee isn't totally decaffeinated & isn't that great for you either! http://www.foxnews.com/leisure/2014/08/25/truth-about-decaf-coffee/
That's America and Fox News to boot, they regularly spot Elvis chatting to John Lennon. The "expert" quoted has neither qualification or research background..."A healthful eating centre in New York" Need I say more?
When I was going through the worst of the hot flushes, I gave up tea and coffee entirely. Did it make a difference? Did it bogroll!