Why is pernicious anemia treated with injections of vitamin B₁₂? A) An immune reaction in the stomach would destroy the vitamin. B) Digestive enzymes would destroy the vitamin. C) The vitamin irritates the gastric mucosa. D) The ingested vitamin would not be absorbed into the blood.

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Quizplus · Accepted Answer

Pernicious anemia is caused by the inability to absorb vitamin B12 due to a lack of intrinsic factor, so injections bypass the digestive system and allow direct absorption into the bloodstream.

Why Is Pernicious Anemia Treated with Injections of Vitamin B12

Why Is Pernicious Anemia Treated with Injections of Vitamin B₁₂