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 ...

In the final phase of boogerfication, the mucus, dirt, and other junk dry up and clump together, forming the nasal classic-- the booger.

Let's take a closer look at that booger. It's mostly made of water, gel-like proteins that give it that gooey consistency and special immune proteins that fight off germs. Those immune proteins ...

Let's take a closer look at that booger. It's mostly made of water, gel-like proteins that give it that gooey consistency and special immune proteins that fight off germs. Those immune proteins ...