Sacha, citing my plan to give up Coke for all of next month: “the caffeine intake of a litre of Coca-Cola is about equal to a cup of well-brewed coffee. Since the drug is second on earth to alcohol in terms of how many people it has been clinically tested on, there doesn't appear to be any adverse effects when taken in moderation over long periods of time. Even Coca-Cola, as a whole, has endured about 80 years without any significant horror stories. The worst of their public relations disasters was of course when they switched to the new Coke formula.”