We hear a lot about gluten these days, but do you actually know what gluten is?

No, no, no --don't go looking it up on WebMD. That's cheating. There's a good chance you don't know, a fact Jimmy Kimmel made very clear.

Well, this video gives a very in-depth definition of what gluten is and how eating it may (or may not) be bad for you. You may be surprised by what you learn.