Pernicious anemia is the lack of intrinsic factor. It is treated by giving enough B12 orally, or by giving it in shots, to get through in spite of the lack of intrinsic factor.

Intrinsic factor still was/is not present in a person has pernicious anemia. Intrinsic factor is only for absorption of B12; it has nothing to do with the body's ability to use B12 once it is has been absorbed.

It is not appropriate or legal to copy content from others without their permission, unless small amounts are quoted along with citation of the source.

rose