The coeliac condition test does not require any special preparation. However, if you have symptoms consistent with coeliac condition (e.g. diarrhoea, constipation, bloating, abdominal discomfort, foul-smelling stools, gas, nausea or vomiting), you should continue to eat gluten-containing foods before taking the test. If you have previously eliminated gluten from your diet, it is possible that the results will be negative, so you should see your specialist doctor for a gluten re-exposure by consuming 8-10g/day of gluten for several weeks before repeating this test. If there is a high suspicion of a gluten-related disorder, you should see your medical specialist.