For many Americans, a morning routine is not complete without a cup of joe. The National Coffee Association reports the average American drinks just over three cups daily. And some people opt to get ...

(CNN) — For many Americans, a morning routine is not complete without a cup of joe. The National Coffee Association reports the average American drinks just over three cups daily. And some people opt ...

We’ve built a complex culture around caffeine. Not only do we have a variety of caffeinated products such as coffee, tea, sodas, energy drinks and pills, but we also have a lot of advice, especially ...