Add Yahoo as a preferred source to see more of our stories on Google. Caffeine is a powerful substance and it's hiding in more places than you'd think. But despite all the negative attention, caffeine ...

In the competitive world of endurance sport, marginal gains matter. From advanced footwear technology to precision hydration strategies, athletes are constantly refining their performance approach.

Caffeine is having a moment, and not for the best reasons. The drug has been linked to two deaths after it showed up in large quantities in a since-discontinued lemonade offering from chain bakery ...