Caffeine

Journalist Murray Carpenter goes inside the big business of caffeine in his new book, "Caffeinated: How our daily habit helps, hurts, and hooks us."

Sunday is National Coffee Day and popular coffee shops are offering complimentary caffeine. Here's a list.

Ranking coffee brands by caffeine amounts.

Wrigley plans to start selling “Alert” gum next month -- that is, gum with caffeine. Gum sales overall are down, and “energy” products are booming. But cities, states and the FDA are investigating caffeine marketing to kids.

Energy drinks are boosting sleepy beverage sales, even as the FDA investigates both Monster Energy and 5-hour Energy.

What do you have when mix you four beers with two cups of coffee? Some call it Four Loko - the canned beverage sold by Chicago-based Phusion Pro...