A patient is being treated for the effects of a longstanding vitamin B12 deficiency. What aspect of the patient's health history would most likely predispose her to this deficiency?
A) The patient has irregular menstrual periods.
B) The patient is a vegan.
C) The patient donated blood 60 days ago.
D) The patient frequently smokes marijuana.
Ans: B
Feedback:
Because vitamin B12 is found only in foods of animal origin, strict vegetarians may ingest little vitamin B12. Irregular menstrual periods, marijuana use, and blood donation would not precipitate a vitamin B12 deficiency.
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