I've been drinking the stuff since 1983!!! I quit for 6 weeks jan this year, did not notice one difference having it or not having it!!!! IBS IS A BEAST....BUT, I've read that you should slowly taper off of caffine over time, like any drug, the body is craving it... I drink maybe one diet coke per day at most now instead of 3 or 4...------------------Breck (Atlanta) "Chronic Pain""His strength is made perfect in my weakness"