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Vitamin B12 is absorbed through two pathways. The first is intrinsic factor, a protein produced by parietal cells in the stomach. IF binds B12 in the small intestine and carries it across Best Vitamin B12 Injection Dose and Frequency PA Relief Intrinsic Factor Blocking Antibodies Second Opinion Physician Intrinsic Factor Reference Ranges Pernicious Anaemia So Many People May Be Misdiagnosed With Pernicious Anaemia You learn something new every day This is most definitely a new one for me! And the reason is something most people including How do intrinsic factor antibodies cause falsely elevated vitamin B12 levels?
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