Summary: What's in your mug? Most of us can't seem to start the day without SOME kind of beverage containing caffeine. Journalist Murray Carpenter freely admits he's often under the influence. So he turned his curiosity on his drug of choice and wrote Caffeinated: How Our Daily Habit Helps, Hurts, and Hooks Us . Murray Carpenter visited the Exchange in 2015, and we return to the interview here.
