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Interference with Diagnostic Tests: May affect results of certain laboratory tests, consult with laboratory personnel for appropriate interpretation

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Indiscriminate administration of vitamin B12 may mask the true diagnosis of pernicious anemia

[16] Transport-mediated absorption and tissue delivery is a complex process involving three transport proteins: haptocorrin (HC), intrinsic factor (IF) and transcobalamin II (TC2), and respective membrane receptor proteins (Figure)

[3] : 313 The most common cause in developed countries is impaired absorption due to loss of gastric intrinsic factor (IF), required for absorption