Quiz: How much do you know about caffeine?

Caffeine is the most widely used drug in the world, and is consumed every day in the form of coffee, tea, chocolate, certain pain relievers, “energy drinks” and more.

Many people start their day with a cup of “Joe.” In fact, nearly 54 percent of Americans over 18 begin their day with coffee.

But how much do you really know about caffeine?

Take this quiz to find out!