Coffee — it’s a beverage most of us need in the morning in order to start the day. But do we actually know why we need it, and what it’s doing to our bodies? The need has a lot to do with the chemical effect caffeine has on our system, and it impacts us for hours after that first sip. Here’s a play-by-play of how caffeine impacts our system from that first sip of coffee until it’s finally out of our system twelve hours later.

What Happens to Your Body When You Drink Coffee?