Why take our celiac genetic predisposition test?

Our celiac disease genetic testing is the most accurate test you have to determine whether or not a person suffers from Celiac disease. Although blood antibody tests are available as well, these are only reliable if the person has been following a high gluten diet. If the person takes the blood antibody test and has not consumed any gluten shortly beforehand, then the test could provide false negative results. People already following a gluten-free diet will not find the answers they need using serology (blood) tests. Moreover, because the symptoms associated with Celiac disease are not necessarily specific to the disease, a genetic test is the only way of determining whether you have celiac disease if you have been on a gluten-free diet.

With celiac disease genetic testing, you can find out whether you are really Celiac at any time and at any age. Our test is ideal for confirming the presence of Celiac disease or even excluding it in cases where following a gluten-free diet does not result in a reduction of symptoms.

Our celiac disease genetic test is offered from $145 and results are ready in 5-10 working days from receipt of samples at the laboratory.

Our celiac predisposition test is really simple

We just require clients to collect samples using sterile mouth swabs found inside the kit we provide. There are no special conditions for mouth swab sampling except to avoid drinking, smoking and eating for 30 minutes before collecting your samples.

Results for celiac disease genetic testing

Celiac disease does not always manifest in clear symptoms – many of the symptoms are shared with a range of other diseases. We offer two types of tests:

      • Standard
      • Extended

Our Standard test determines the two alleles belonging to the HLA family related to celiac disease. The DQ2.5*02 genetic variant, present in 90-95% of celiac subjects, and the DQ8, *0302 genetic variant, present in the remaining 10-5% of celiac subjects are evaluated. The cost of the standard test is $145.

The test on 2 genetic markers can be used for the following purposes in the diagnosis of Celiac Disease:

      • To derive complex diagnoses in case there are interpretative difficulties between serology and biopsy.
      • To confirm a diagnostic test.
      • For an adequate preventive strategy.

For an example of results, please click below:


Our Extended test will test 16 markers in the HLA system for an additional $60.

The test on 16 genetic markers in addition to the points above has also the following purposes:

      • To exclude the disease in case of a negative result.
      • To determine your “risk” of developing celiac disease.
      • To determine the HLA structure of the relatives of the celiac.

For an example of results, please click below:

In short, in case of positivity (where at least one of the markers is not showing low susceptibility), the standard test (with 2 markers) requires confirmation with a serological test or an intestinal biopsy or the extended test (with 16 markers) which on the other hand, gives the attribution to a risk class ranging from high to very low.

In case of negativity, with the standard test (where both markers are showing low susceptibility) the coeliac disease diagnosis is highly unlikely and the negative predictive value is greater than 99%, whilst with the extended test, this can even be considered as a diagnostic test and you can rest assured that you will never suffer from coeliac disease.

Note that the test results cannot confirm you are Celiac at the time of testing. If tests come back positive, the next step in diagnosing celiac disease should be discussed with your health specialist.

Frequent questions

What is celiac disease?

Celiac disease (sometimes also called Celiac Sprue) is an autoimmune disorder where the body is unable to break down a gluey protein found in wheat called “gluten”. If gluten cannot be broken down, the intestinal tract may be damaged over time and absorption of food compromised. Every time gluten is ingested, the body ends up fighting against itself and damaging itself. This means that a Celiac sufferer could exhibit a host of unpleasant symptoms as a direct or indirect effect of the disease. Malabsorption of food could lead to tiredness and fatigue, muscle wasting and nausea amongst many other symptoms.

What are the symptoms of Celiac Disease?

Symptoms of celiac disease vary from one person to the next, however these may include:

  • Failure to thrive (weight loss/failure to gain weight), particularly in children
  • Nausea
  • Diarrhoea
  • Steatorrhea (loose and greasy stool)
  • Dermatitis herpetiformis (severe skin rash)
  • Missed periods

A predisposition to Celiac disease but no symptoms?

Our genetic predisposition test for Celiac disease only establishes the likelihood that you will develop Celiac disease over the course of your life. This means that at the time of testing you may or may not be suffering from Celiac disease.

Can I take any other tests?

Besides a celiac disease genetic test, serology tests for celiac disease are available but to take this test you must be on a gluten-containing diet. If you have been on a gluten-free diet, you will need to start introducing gluten over a period of time in order to increase your levels of antibody. This test can cause some discomfort due to the fact it requires you to be on gluten containing diet – unlike our Celiac genetic test which can be done on people following a gluten-free diet. Whilst this may result in some discomfort, it is necessary to carry out this type of test. The test analyses the blood sample to verify the levels of the antibody known as Tissue Transglutaminase or tTG-IgA produced in response to gluten ingestion.We do not offer this test and suggest you speak to your doctor if you are interested in it.

Related Tests: Testing for Lactose Intolerance

Is your body unable to digest lactose, a type of sugar found in milk, cheese and other dairy products? If so, you might be lactose intolerant like a substantial part of the world’s population. homeDNAdirect offers lactose intolerance DNA testing for those who want to find out and start feeling better by regulating their diet.