I am a coffee addict! I used to drink about 5-7 large cups a day! At one point, I had to actually go to my doctor because I couldn't sleep and I was always jittery. This was about the time when Michael J. Fox came out with the news that he had Parkinson's at such an early age. Needless to say, I panicked! I demanded my doctor refer me to a neurologist but lo and behold, it was just the dam coffee. I'm much better now (down to only 2 cups a day).