Gluten: the spectrum of the gluten disorders and what you need to know. It used to be that Celiac disease was considered extremely rare outside Europe and, therefore, was almost completely ignored by U.S. health care professionals. Ten short years later, celiac disease and other gluten-related health conditions have moved from obscurity into the spotlight. Celiac disease triggers an abnormal immune response when foods that contain gluten are consumed. Gluten is a type of pro