Celiac disease is an autoimmune disorder, with symptoms that range from gas and diarrhea to irritability and depression. It is caused by an intolerance to the protein gluten, which is found in foods that contain wheat, rye, and barley.

There is no cure or medication to treat celiac disease. Instead, parents must put their children on a gluten-free diet that doesn't contain any foods that are made with wheat, rye, or barley (and sometimes oats).

Related: Gluten Free Medications | Diarrhea | Reading Food Labels