However, the prevalence of celiac disease is higher among people with type 1 diabetes. Approximately 8 to 10 percent of people with type 1 diabetes also have celiac disease. Researchers don't know for sure why the prevalence of celiac disease is higher among people with type 1 diabetes, but they think it probably has something to do with the fact that both diseases are autoimmune conditions, and so they may share genetic similarities. Every person with type 1 diabetes should be tested for celiac disease so they can go on a gluten-free diet if necessary. If people with celiac disease continues to eat gluten, they are at risk for developing other complications such as osteopenia, osteoporosis, iron deficiency anemia, fatigue, and more serious complications such as intestinal cancers.