Many of us can barely make it through the morning without first downing a cup of hot coffee. It's become such a big part of our daily rituals that few actually give much thought to what it is that we're putting in our bodies.
To help us break down the little-known things about caffeine, NPR's David Greene spoke with Murray Carpenter, author of Caffeinated: How Our Daily Habit Helps, Hurts and Hooks Us. These are the things you probably aren't thinking about as you wait in line at your local coffee shop.
Caffeine is a drug. Treat it as such.