The Celiac disease is a medical condition where the surface of the small intestine is damaged by gluten found in grains like wheat, rye and barley. Gluten sends a signal to the triggering member of an autoimmune reaction, which has the same effect as food poisoning. Gluten Symptoms of eating vary, but often the result is diarrhea and abdominal pain.
The gluten by damage prevents the intestine from absorbing nutrients, which are necessary for good health. The long-term result can be permanent damage to the intestines and malnutrition. Depending on gluten sensitivity of the person, even a small amount of gluten can be all that is necessary to trigger a reaction. So you need to take Gluten-free food for your good health.
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The only treatment for celiac disease is to eat gluten abstained forever. There is no known cure for celiac disease.
Bread products of course have gluten, but it is amazing how many other foods contain gluten. Gluten is used for a filler or thickener in many canned goods, processed foods, spices and sauces. The Celiacs can control the food supply in their own home reading labels and paying attention to what they buy and eat.
A simple thing like soaking in butter again when buttering toast, may leave bread crumbs in butter. This may be all it takes to trigger an autoimmune reaction. Some celiac remove all gluten from their house and eat all the gluten-free world, it is easier and safer that way.