Coeliac disease in an autoimmune disorder of the small intestine, which results in an unpleasant reaction to ingested gluten. Symptoms range from mild to severe and can include abdominal pain and bloating, chronic or occasional diarrhoea, tiredness, iron-deficiency anaemia, nausea or vomiting, and weight loss. The disorder has a complex genetic background, although additional environmental factors also need to come into play. Its treatment is solely dependent on the exclusion of gluten from the diet. </jats:p