Checks for the HLA-DQ2 and HLA-DQ8 genes linked to coeliac disease.
Nearly everyone with coeliac disease carries DQ2 or DQ8, so a negative result practically rules out coeliac disease; a positive result alone does not confirm it.
Abdominal pain, diarrhoea, bloating, indigestion or suspected digestive disease.
No fasting needed.
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No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample (EDTA tube); some genetic tests also accept saliva, tissue or other samples.
Usually within 4–5 days after the sample reaches the lab. You will receive the report online.