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Diseases reference index «Intrinsic factor»

Intrinsic factor

Intrinsic factor is a protein produced by cells in the stomach lining. It is needed for the intestines to absorb vitamin B12 efficiently.

Information

In a disease called pernicious anemia, immune system damage to the stomach lining can cause a lack (deficiency) of intrinsic factor. Pernicious anemia causes vitamin B12 deficiency, which leads to a low red blood cell count (anemia).

Intrinsic factor deficiencies can also be caused by other reasons, such as:

  • Inherited conditions
  • Other diseases
  • Surgical removal of the stomach

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