Anecdotal: I gave up my caffeine when it got the point that I was consuming 3-4 cups a day to combat persistent sleep deprivation and I noticed my stomach no lo

Anecdotal: I gave up my caffeine when it got the point that I was consuming 3-4 cups a day to combat persistent sleep deprivation and I noticed my stomach no longer would cooperate with it. Immediately, I began having dreams again which I hadn't had in years and didn't notice when they disappeared. I had bad headaches that tapered off after about 2-3 months. I awake usually refreshed, and my sleep patterns are much more regular, my body no longer can deal with less than 7 hours of sleep and will complain to me if I try to get away with less. My experience was ultimately that caffeine kept me awake but not at my cognitive best. I think it only worked before because I was younger and I'm now middle-aged. My stomach, brain, and body are better without a doubt. I still have small glasses of tea every once in a while when I really miss a hot drink and a pick me up. Hope this helps anyone else considering.