a-INTRINSIC FACTOR (IF)

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The intrinsic factor (IF) test is used to detect antibodies against intrinsic factor, which is essential for the absorption of vitamin B12 in the small intestine.

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The intrinsic factor (IF) test is used to detect antibodies against intrinsic factor, which is essential for the absorption of vitamin B12 in the small intestine. These antibodies are often found in pernicious anemia and autoimmune gastritis. The test is performed when vitamin B12 deficiency is suspected, especially if symptoms of anemia or neurological issues are present, and it serves as a complement to the test for antibodies against parietal cells.