Celiac disease is a chronic autoimmune disease where the immune system attacks and damages the villi in the small intestine upon ingestion of gluten. The damaged villi can no longer properly absorb nutrients. It is commonly found in people of European ancestry and children or relatives of those with celiac disease are at a higher risk. The only treatment is a lifelong gluten-free diet, though following the diet allows the villi to heal and patients to live healthy lives, the disease itself cannot be cured.