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Intrinsic Factor Antibody

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Also known as: IF Antibody; IF Antibody Type 1 or Type 2; Intrinsic Factor Binding Antibody; Intrinsic Factor Blocking Antibody; Anti-Intrinsic Factor
Formal name: Intrinsic Factor Antibody

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At a Glance

Why Get Tested?

To help diagnose pernicious anemia, the most common cause of vitamin B12 deficiency

When to Get Tested?

As part of an investigation, when you have anemia and/or neuropathy that may be due to a vitamin B12 deficiency; when you have red blood cells that are much larger than normal (macrocytic)

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

You should wait at least 48 hours after receiving a vitamin B12 injection to have a blood sample taken. Some healthcare providers may prefer not to draw a blood sample for the test within 2 weeks of an injection.