Spike, I stopped drinking for a few weeks in 2002 and noticed that I "substituted" it with tea and drank it like crazy. Then I went even more nuts on it when I quit alcohol recently, before Xmas. It was ridiculous how much I was having. Initially it didn't seem to have any impact on my sleep but that changed, and it was obviously only adding to the return of insomnia and utterly rotten sleeping patterns I hadn't had for years. I don't know if I am correct on my chemistry or not, but I associate too much caffeine with feeling depressed - something else I didn't need to add to. I have brought the tea way down, just to start out in the morning (the way I used to do with coffee, which I don't bother with anymore). I don't let myself have any past noon.