You've no doubt heard plenty about gluten and going gluten-free. But do you know what gluten really is, and why some people are cutting it from their diets? What about which foods contain gluten — bread? Rice? Quinoa? And do gluten-free foods even taste good?

To get you the facts and clear up some myths about gluten, we've teamed with LUNA, whose delicious protein- and fiber-filled bars are now gluten-free in every flavor. Here's the scoop.