Coffee and what it does to your body BBC world service

Billions of people around the world rely on a little cup of coffee to get them through the day. But have you ever stopped to think about what it's doing to your body?We take a deep dive into your coffee cup, to see what the caffeinated drink does to the human body and what happens if you have one too many espressos. We also go on a short history trip to see how it went from humble beginnings in Ethiopia, to a worldwide billion-dollar industry.