Coeliac Disease is not a food allergy or intolerance, it is an autoimmune disease in reaction to small amounts of gluten in the diet. Symptoms of Coeliac Disease can include diarrhoea, wind, constipation, cramping or bloating. Many people think you need to be underweight or to have lost weight to have Coeliac Disease - in fact most people are of normal weight or even overweight at the point of diagnosis.
Please note this blood test is only able to detect the Coeliac Disease antibodies (IgE and TTg) if a diet which includes gluten has been eaten for a period of six weeks before the test is taken.