How Caffeine Helps, Hurts, and Hooks Us

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Caffeine is the most popular drug in America. Murray Carpenter why caffeine has such a powerful effect on us—it can boost our mood and improve our athletic performance. He looks at the various ways caffeine is delivered to the body, how it affects us, and why it’s not regulated. He’s the author of Caffeinated: How Our Daily Habit Helps, Hurts, and Hooks Us.