For many blurry-eyed early risers, the day doesn't truly begin without a jolt of caffeine from a cup of coffee, an energy drink, or a can of soda. For Diet Coke enthusiasts, the famous soda in the ...

However, caffeine-free Diet Coke did just as well, suggesting that caffeine does not accelerate the reaction, at least at the normal levels in the drink. They also measured the pH of the Coke ...