I've involuntarily gone cold turkey (for a day or two) a couple times, and I got splitting headaches. (Note to self: bring secret stash of Diet Coke for any visits with the Toronto relatives.)
Every fall I spend about a week gradually reducing caffeine from normal to zero, in preparation for Yom Kippur, and that works pretty well for me. I don't know what other effects there might be if I then stayed off the stuff, as I haven't tried. I break the fast with caffeine. :-) (Ok, first I have some water, then caffeine.)
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Every fall I spend about a week gradually reducing caffeine from normal to zero, in preparation for Yom Kippur, and that works pretty well for me. I don't know what other effects there might be if I then stayed off the stuff, as I haven't tried. I break the fast with caffeine. :-) (Ok, first I have some water, then caffeine.)