Your roommate has been taking the antibiotic tetracycline for 2 years to control her acne. Routine blood work reveals that she has a vitamin deficiency. Which of the following is an adequate explanation for her vitamin deficiency?
A) Antibiotics can bind to vitamins in the intestinal tract and prevent their absorption.
B) Antibiotics kill the normal flora (resident bacteria) of the intestinal tract, which is responsible for synthesizing certain vitamins.
C) Taking antibiotics for extended periods of time slows down metabolism.
D) None of the above is an adequate explanation.
Correct Answer:
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