Celiac Disease is an auto-immune disorder. People with Celiac Disease cannot eat things that contain wheat, rye, gluten, barley, oats, semolina, durum, malt, and many other things. Cross contamination seems to be a big issue/concern with this population and it is hard for many restaurants to accommodate people with the disease. It is important that people know that Cross Contamination is dangerous. 1 out of every 133 people in the United States have Celiac Disease.