Lots of headache first few days. It’s getting better as time goes. The reason I am trying to do that is it (the coffee) appears to make me go to restroom much more often. I want to eliminate this one factor to see if things get better.
A second reason, is I don’t want to dependent on one thing (coffee is addictive). I recall last summer when I was in China, and I could not find coffee in my hometown and my wife’s hometown, and I got headache. Eventually I was able to find the “American style” iced coffee and a bakery and certainly at McDonald. I think I need to reduce my coffee intake, and if I can stay alert without it, that will be the best.