If a patient needs regular injections of vitamin B₁₂,the most likely explanation is that
A) he or she follows a vegan eating pattern.
B) he or she struggles with alcoholism.
C) he or she has a malabsorption syndrome.
D) his or her stomach does not produce intrinsic factor.

Question

Quizplus · Accepted Answer

Vitamin B₁₂ injections are necessary for patients who do not produce intrinsic factor,which is essential for absorption of vitamin B₁₂ from the gut.Patients who follow a vegan eating pattern need vitamin B₁₂ supplements because this vitamin is found only in animal foods.However,they can use oral supplements because they are still able to absorb the vitamin;they do not need injections.Alcoholism does not affect absorption of vitamin B₁₂.Malabsorption syndromes may decrease absorption of vitamin B₁₂,but with adequate dietary intake and supplements,affected patients may still be able to absorb sufficient amounts from the gut.

If a Patient Needs Regular Injections of Vitamin B₁₂,the Most