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Gluten-free diet

Celiac disease

Celiac disease is a type of autoimmune condition. That means the immune system mistakenly attacks healthy tissues and organs. With celiac disease, gluten triggers an immune system reaction that damages the lining of the small intestine. This condition can cause digestive symptoms such as stomach pain, bloating and diarrhea. It also can lead to ongoing extreme tiredness, headaches, depression, and bone or joint pain. Over time, damage to the small intestine prevents this organ from absorbing nutrients in food.