What is the intrinsic test for B12? A guide to intrinsic factor antibody testing
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4 min read
According to the NIH, an Intrinsic Factor Antibody (IFAB) test is used to detect antibodies that block vitamin B12 absorption, and it is a key diagnostic tool for pernicious anemia. This article explains what is the intrinsic test for B12, its purpose, procedure, and how it is used today compared to the now-obsolete Schilling test.
