Intrinsic Factor IgG Antibody Test

What is the intrinsic factor IgG antibody test for?

This test detects IgG antibodies against intrinsic factor, a protein essential for vitamin B12 absorption. The presence of these antibodies is strongly associated with pernicious anemia, an autoimmune disorder leading to B12 deficiency.


Why is it important to check for intrinsic factor antibodies?

If left untreated, vitamin B12 deficiency can cause anemia, fatigue, neuropathy, and neurological complications. Identifying intrinsic factor antibodies confirms the autoimmune cause, allowing for lifelong management and B12 supplementation.


How is the test performed?

 A blood sample is collected and analyzed using immunoassay techniques to detect the presence of IgG antibodies directed against intrinsic factor.


Is there any special preparation required?

 No specific preparation is necessary. You should, however, inform your doctor of any B12 supplements or injections taken recently, as they may influence the results.


How long will it take to get the results?

Results are typically available within 3–5 days. If the test is positive, additional evaluations like B12 levels and a complete blood count (CBC) may be recommended.