Gastric parietal cell antibodies blood test in Chiswick

What the test measures

Parietal cells in the stomach make acid and intrinsic factor, a protein needed to absorb vitamin B12. In autoimmune gastritis the immune system attacks these cells, and gastric parietal cell antibodies can be found in the blood. Over time this can reduce acid and intrinsic factor, leading to B12 deficiency and pernicious anaemia, and sometimes to iron deficiency.

Parietal cell antibodies are found in most people with pernicious anaemia, which makes them a sensitive marker, but they are also present in some people with no stomach problem, especially older adults and people with other autoimmune conditions such as thyroid disease or type 1 diabetes. For this reason they are usually tested together with intrinsic factor antibodies, which are less common but more specific.

The price includes your sample at our Chiswick clinic, analysis at the Randox accredited laboratory, a review of your result with an Omnia practitioner, and a GP feedback report on request.

Who it is for

• You have low vitamin B12 and want to understand whether absorption is the cause.
• You have been told you may have pernicious anaemia.
• You have an autoimmune thyroid condition or type 1 diabetes and low B12 or iron.
• You have tingling, numbness or tiredness with a low B12 result.
• Your practitioner has suggested looking for autoimmune gastritis.

Understanding your result

Your report shows whether gastric parietal cell antibodies were detected, and sometimes a level, with the laboratory reference range. A positive result supports autoimmune gastritis when it fits with low B12 or other findings. A negative result makes pernicious anaemia less likely but does not exclude it entirely, particularly in long-standing disease.

Because these antibodies can be found in healthy people, a positive result is a prompt for discussion, not a diagnosis. Your practitioner reads it alongside your B12 level, blood count and symptoms, and may suggest discussing confirmation and treatment with your GP. Long-standing autoimmune gastritis can need periodic review by a specialist, which your GP can advise on.

Preparing for your test

Fasting is not required. You can continue your usual medicines, but tell us if you have started B12 injections or tablets, as this does not change the antibody result but helps your practitioner interpret it alongside other tests. Biotin supplements should be paused for 48 hours beforehand.

Pairing this with an intrinsic factor antibody test gives a clearer picture, and our vitamin B12 tests check your current levels. Parietal cell antibodies are also included in Omnia Signature, and you can see every blood test and price in Chiswick.

Questions

How much is a gastric parietal cell antibodies test in Chiswick?

The gastric parietal cell antibodies test costs £99 at Omnia Lifestyle. This covers the blood sample at our Chiswick clinic, laboratory analysis, a practitioner review and a GP feedback report on request.

How is this different from intrinsic factor antibodies?

Parietal cell antibodies are more common and more sensitive, while intrinsic factor antibodies are less common but more specific for pernicious anaemia. Testing both gives the most useful picture.

Can I have the antibodies and feel well?

Yes. Some people have parietal cell antibodies without any symptoms or deficiency. Your practitioner may suggest periodic B12 checks.

Does a positive result mean I need B12 injections?

Not necessarily. Treatment depends on your B12 level, symptoms and the overall assessment, which your GP can guide.