By 
William Chey
 | 
TED-Ed Original

What's the big deal with gluten?

If you've been to a restaurant in the last few years you've likely seen the words gluten-free written somewhere on the menu. But what exactly is gluten and why can't some people process it? And why does it only seem to be a problem recently? William D. Chey unravels the facts behind celiac disease wheat allergies and non-celiac gluten sensitivity.

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