No: Pernicious anemia is a disease of gastric parietal cells, which secrete intrinsic factor, a chemical cofactor that complexes with B12 and without which B12 cannot be absorbed. There is no supplement or anything else you can take that will affect this. B12 injections are enough. Listen to your doctor; (s)he's the doctor and you're not.
Answered 8/9/2017
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