Topical Currents looks at the most popular drug in
the United States– caffeine. It’s the addictive and largely unregulated drug found in coffee, energy drinks, tea, cola, chocolate and even pain relievers. Why does caffeine have such a powerful effect on everything from boosting our mood to improving our athletic performance? We’ll visit with journalist Murray Carpenter. He’s written "Caffeinated: How Our Daily Habit Helps, Hurts and Hooks Us." Learn more on Topical Currents. . . Tuesday at 1pm.