More and more gluten-free products have been appearing on grocery store shelves in recent years, and for this week's Please Explain segment, we'll find out what gluten is and find out the causes, symptoms, and treatment for celiac disease and other gluten sensitivities. Dean Lavornia is Chair of the Baking & Pastry Department at the Johnson & Wales University College of Culinary Arts in Providence, Rhode Island. He's created a number of gluten-free recipes for those in his family with celiac disease. We'll also speak with Nutritionist Bernadette Latson, an Assistant Professor in the Department of Clinical Nutrition at the University of Texas Southwest Medical Center.