I had a bad dose of the 'flu in 2005. I could keep hydrated, but not tolerate much else. By day three I had the headache from hell, and eventually figured out i

I had a bad dose of the 'flu in 2005. I could keep hydrated, but not tolerate much else. By day three I had the headache from hell, and eventually figured out it was caffeine withdrawal. I decided I didn't want to be functionally dependent on daily doses of caffeine and gave coffee and black tea away completely (I've never been one for caffeinated soft drinks). Since then I drink green, white and herbal teas, and an occasional decaf because I do love the flavour and aroma. For me there's been no downside to stopping caffeine.