CAFFEINE IS STRESS IN A CUP. IT IS NOT GOOD FOR YOU. Sure, I like it, and I can get a lot of desk work done when I'm "using", but no amount of research will convince me that daily intake of 500mg or more long term is not harmful to your physical and emotional health. As I've written before, I believe that the American's average intake has (at least) doubled or tripled over the past 20 years. We will eventually link caffeine abuse to many chronic illnesses but, then again, finding such a link would not be profitable so perhaps not...
Americans love choice, but few exercise that power when it comes to diet. Americans love familiarity. Americans very quickly fall into dietary ruts. When it comes to caffeine, "use" can very easily become "ab-use" for me (and many of you too). What starts out as one coffee or soda a day, quickly turns into a half dozen. I like coffee, tea, and sodas too much to give them up completely, so I've taken to implementing periodic "caffeine fasts" of two to four weeks duration. Although it is not much fun for the first week, I find that after that initial week, I sleep MUCH better and am generally a nicer and more mellow person to be around. And, in the weeks following my fasts, I need caffeine less and get a better "response" from caffeine if I do decide to have some before work or training.
If you are a "heavy consumer" and decide to try a fast, I would recommend weaning yourself off incrementally rather than going cold turkey. Substituting decaffeinated coffee, teas, and sodas is a good start. During fasts, I drink a lot of sparkling seltzer water to satisfy my cravings for carbonated beverages. When you crave something sweet, flavored teas or decaffeinated coffee with a little sugar will hit the spot.
Canada Dry Sparkling Seltzer Water (Lemon Lime)