What is the most likely contributing factor for the laboratory result of the iron level being 42 mg/dL in a 45-year-old woman?
A. 60 pack-year smoking history
B. Heavy menses for the past 6 months
C. Diet chronically low in vegetables and high in meats and fats
D. Presence of chronic allergies, for which she takes diphenhydramine (Benadryl) daily
B
Iron levels can be low either because intake of iron is too low or there is an excessive loss of iron through bleeding. A woman of this age may be having unusually heavy menses sufficient to cause excessive loss of blood and iron. Smoking and diphenhydramine do not induce iron defi-ciency.
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