Injections of vitamin B₁₂, which must be continued for life, are the primary treatment for pernicious anemia.

Name: Injections of vitamin B₁₂, which must be continued for life, are the primary treatment for pernicious anemia.
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Intrinsic factor must be present in the gastric mucosa for vitamin B₁₂ absorption to occur. Vitamin B₁₂ is necessary for RBC formation, and a deficiency causes RBCs to be deformed and reduced in number.

Injections of Vitamin B₁₂, Which Must Be Continued for Life