What is pernicious anemia (Vitamin B12 deficiency anemia)? Vitamin B12 Deficiency: Recognition and Management. Semantic Scholar Addisonian anemia: a lack of vitamin B12 in persons who do not produce stomach intrinsic factor (IF) that facilitates absorption Pernicious anemia (antibodies to intrinsic factor or parietal cells IF Causes of B12 deficiency and how its related to MTHFR?
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