Are you someone who needs a cup of coffee or spot of tea to start the day? Would you be surprised to hear that the key ingredient, the thing that gives you that morning boost - caffeine - is also a psychoactive drug? Whether it’s coffee, tea or soda, people around the world consume some form of caffeine every day. Even kids! But what is it actually doing to our brains? What causes that jolt of energy in the morning, and what are the drawbacks? On this episode of Chasing Life, Dr. Sanjay Gupta talks to science writer Michael Pollan about his research, the history of caffeine – and quitting cold turkey.To learn more about how CNN protects listener privacy, visit cnn.com/privacy