Vitamin B₁₂ is poorly absorbed in the absence of

Name: Vitamin B₁₂ is poorly absorbed in the absence of
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Vitamin B12 requires intrinsic factor (IF), a protein secreted by the parietal cells of the stomach, for absorption in the small intestine. Without IF, vitamin B12 cannot be absorbed and will be excreted. This is why people with pernicious anemia, who have an autoimmune disease that attacks the parietal cells and inhibits IF production, require B12 injections to ensure sufficient absorption.

Vitamin B₁₂ Is Poorly Absorbed in the Absence of