13 surprising foods you didn't know contained gluten

Many people believe that cutting out gluten, the protein found in wheat, is helping them feel like their healthiest selves.

But while research suggests the vast majority of people don't need to avoid gluten, for people with celiac disease, an autoimmune disorder in which gluten damages the small intestine, a gluten-free diet is necessary to avoid some very nasty symptoms.

Going gluten-free means, yes, avoiding breads and other wheat-based products, but there are a number of other foods one wouldn't expect to contain gluten that could have it.

Here are 13 foods you should avoid if you have celiac: