General

Synonym/Acronym:
IF antibodies, intrinsic factor blocking antibodies.

Rationale
To assist in the investigation of suspected pernicious anemia.

Patient Preparation
There are no food, fluid, or activity restrictions unless by medical direction. Administration of vitamin B₁₂, injected, ingested, or administered otherwise (e.g., absorbed by nasal gel or sublingual tablet), should be withheld within 2 wk before testing.

Normal Findings
(Method: Immunoassay) Negative.

Critical Findings and Potential Interventions
N/A