There are many foods that are high in gluten. Some of the more common ones include bread, pasta, cereal, and baked goods. Gluten is a protein found in wheat, rye, and barley. It is what gives these foods their chewy texture and helps them to maintain their shape. For people with celiac disease or non-celiac gluten sensitivity, eating foods high in gluten can cause serious health problems. Symptoms of celiac disease include abdominal pain, diarrhea, weight loss, fatigue, and anemia. Non-celiac gluten sensitivity can cause similar symptoms but is often less severe. People with either condition need to avoid eating foods that contain gluten in order to stay healthy.