Medically reviewed by Chris Vincent, MD Everyone experiences boogers (dried phlegm) daily. They may seem gross, but boogers are an essential part of your body's immune system. But what are boogers ...

But maybe you didn't stop there. Maybe you ate those boogers too! And it turns out, that slimy snack could hurt more than just your social standing. Let's take a closer look at that booger.

You loved them as a kid, you flung them across the room, and you probably even ate a few. Your nose is built with a fantastic gooey substance called mucus, and we produce close to a liter of it ...

But maybe you didn't stop there. Maybe you ate those boogers too! And it turns out, that slimy snack could hurt more than just your social standing. Let's take a closer look at that booger.

Curtis was discussing her plans for her 40th anniversary with filmmaker Christopher Plummer when she suddenly interrupted her own interview to ask the daytime hosts, “Hold on, do I have boogers?” ...