An estimated 18 million Americans are believed be sensitive to gluten — a protein found in wheat, barley, and rye — and nearly 3 million Americans suffer from full blown celiac disease, which makes gluten a life threatening addition to their diet over time. For our weekly series, “Eat This!” we talk about the gluten free diet with restaurateur and co-author of Cooking for Your Gluten-Free Teen: Everyday Meals Your Whole Family Will Love, Carlyn Berghoff and WBEZ producer Monica Eng. (Photo: Flickr/ilovememphis)