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It is estimated to affect 1 in 100 people worldwide. Two and one-half million Americans are undiagnosed and are at risk for long-term health complications.’ People who have celiac disease may have other autoimmune diseases, such as thyroid disease, type 1 diabetes, lupus, rheumatoid arthritis, liver disease. Testing to find out if someone has celiac disease includes a blood tests and an endoscopy. In a blood test elevated levels of certain substances antibodies indicate an immune reaction. These tests detect celiac disease even if the patient has mild symptoms or none at all. If their blood tests indicate this disease, the doctor may order an endoscopy to view their small intestine and to take a small tissue sample to