What is coeliac disease, which is related to dietary gluten?

Coeliac disease is an autoimmune inflammatory condition triggered by an immune-mediated response to dietary gluten, which is a protein found in wheat, barley, etc. The immune system of affected individual mistakes substances found in gluten as a threat to body and attacks them. The attack damages the surface of small intestines, impairing the body’s ability to absorb nutrients from food.