When people with celiac disease eat gluten (a protein found in wheat, rye and barley), their body mounts an immune response that attacks the small intestine. These attacks lead to damage on the villi and nutrients cannot be absorbed properly into the body.
A simple blood test is available to screen for celiac disease. People with celiac disease who eat gluten have higher than normal levels of certain antibodies in their blood.
Currently, the only treatment for celiac disease is lifelong adherence to a strict gluten-free diet. People living gluten-free must avoid foods with wheat, rye and barley, such as bread and beer.