Caffeine is the world’s most popular drug — but how does it work?

You’re probably about three cups deep already, but do you really know how the caffeine in coffee and energy drinks actually work?

Since caffeine isn’t just in coffee anymore — it’s added to drinks, gum and even beef jerky — caffeine is in almost everything.

In this helpful video, the actual science behind the world’s most popular drug is discussed, and we all find out why the little molecule keeps us all wide awake.