Coeliac Disease Blood Test

Want to know if you have coeliac disease (celiac disease)? Take a coeliac disease blood test to find out.

Coeliac (celiac) testing is quick and easy. All you need to do is take a finger-prick blood sample and return it using the prepaid envelope. Your sample will be analysed by our UKAS-accredited lab partner (who also test for the NHS) and you'll get your coeliac blood test results and doctor's report in days.

  • Results and doctor's report in 3 days or less
  • Free, next-working day delivery
  • Approved coeliac antibody test


Personalise your coeliac blood test

You can choose how you'd like to collect your blood sample. You may also want to add to your test panel depending on your age, sex and any symptoms.

Choose how to collect your blood sample
Add to your test
Dr Claire Merrifield

Dr Claire Merrifield

GP, PhD and our Medical Director

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What you need to know about our Coeliac Disease Blood Test

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Dr Claire Merrifield

Dr Claire Merrifield

GP, PhD and our Medical Director

Our Coeliac Disease Blood Test is a comprehensive antibody test that's recommended for diagnosing coeliac disease. The test is fast, accurate and you get a doctor's report explaining exactly what your results mean.

The bottom line is that if you want to know if you have coeliac disease, this is the blood test you need.

What is coeliac disease?

Coeliac disease affects about 1-in-100 people but most don't know they've got it. Although some people refer to coeliac disease as "gluten allergy", coeliac disease is actually an autoimmune condition, not an allergy. This means that coeliac diseased is caused by your immune system reacting against your own body. In coeliac disease, a substance called gluten triggers your immune system to attack the lining of your gut, causing inflammation and gut symptoms. Gluten itself is harmless, it's the body's reaction to it that causes a problem. Gluten is found in wheat, barley and rye so you'll find it in bread, pasta, cakes and even beer.

Coeliac symptoms?

Our coeliac blood test is for you if you have been experiencing any of the following symptoms commonly associated with coeliac disease:

  • Stomach pain and cramping
  • Nausea and vomiting
  • Bloating
  • Diarrhoea
  • Tiredness
  • Weight loss
  • Skin rashes

You can also have these symptoms after eating gluten without having coeliac disease. This is called non-coeliac gluten sensitivity. The main way to tell the difference between Coeliac Disease and non-Coeliac gluten sensitivity is to take a Coeliac Disease test.

Lastly, it's important to know that a third of people with coeliac disease don't have any symptoms. This is called "silent-coeliac disease".

What do the coeliac blood test results mean?

The coeliac disease blood test checks your levels of tissue transglutaminase IgA (TAA) antibody.

TAA Level (IU/ml)Meaning
< 0.3 Possible IgA deficiency. We'll go on and test your total IgA levels and deamidated gliadin peptide antibodies if necessary.
0.3 - 6.9Normal: coeliac disease very unlikely
7-10 Borderline. Coeliac disease possible, we'll go on and test your anti-endomysial IgA antibody levels for further information.
> 10 Positive. Coeliac disease likely, we'll go on and test your anti-endomysial IgA antibody levels to confirm.

If the test result is negative, but you still get symptoms when eating gluten, then you may have non-coeliac gluten sensitivity.

What's the difference between coeliac disease and gluten intolerance?

Coeliac disease is an autoimmune reaction to gluten characterised by inflammation in the bowel. However, some people complain of gut symptoms when eating gluten but have no inflammation in the bowel. This is "gluten intolerance" or "non-coeliac gluten sensitivity". The only way to tell the difference between non-coeliac gluten sensitivity and coeliac disease is to take a coeliac disease test.

What's tested in your Coeliac Disease Blood Test?

Our coeliac test is a fully comprehensive multi-step panel including free confirmatory testing so you can have full confidence in your results.

Please note that you need to have had gluten in your diet in the 6 weeks before testing for coeliac disease blood tests to be accurate.

  • Tissue transglutaminase IgA antibodies

    This is the gold-standard, NHS-approved blood test for coeliac disease. We measure this in all cases.

  • Total IgA antibodies

    If your tissue transglutaminase IgA level is low, we'll go on and test your total IgA antibody level to make sure you produce this type of antibody.

  • Deamidated gliadin peptide IgG antibodies

    If you're found to be IgA deficient, we'll go on and test your deamidated gliadin peptide IgG antibody levels which can indicate coeliac disease.

  • Endomysial IgA antibodies

    If your tissue transglutaminase level is high, we'll go on and test your endomysial antibody levels to confirm that coeliac disease is highly likely.

Find out more about testing for coeliac disease