A chronic digestive tract ailment called celiac disease, also known as celiac sprue or gluten-sensitive enteropathy, causes an intolerance to gliadin, the alcohol-soluble portion of gluten. Wheat, rye, and barley are frequently sources of the protein called gluten. Gliadin causes an immunologically driven inflammatory reaction in celiac disease patients that destroys the mucosa of their intestines, impairing their ability to digest and absorb...