Too much caffeine (5+ cups a day): Bad sleep, wake in the middle of night with pounding heart Zero caffeine (for two years): Okay, everything is fine, but somet

Too much caffeine (5+ cups a day): Bad sleep, wake in the middle of night with pounding heart Zero caffeine (for two years): Okay, everything is fine, but sometimes miss coffee boost and taste. Two cups a day: Everything is fine and I get to enjoy coffee. Never in the evening though. Moderation! Same with everything.