A member asked:

Does pernicious anemia cause high serum b12?

A doctor has provided 1 answer

Low vitamin B12.: pernicious anemia is a LOW vitamin B12 state. This occurs when the body fails to make enough of a specific protein to enable the body to absorb vitamin B12. This usually occurs when the immune system attacks a specific cell in the stomach that produces the needed protein. Since the body can't absorb vitamin B12 through the stomach it can be given in a shot and even under the tongue.

Answered 1/19/2019

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