Nutrition and Vitamin Deficiencies · USMLE Step 1

Chronic deficiency of which vitamin impairs calcium absorption, predisposing to osteomalacia in adults or rickets in children?

  1. Vitamin A
  2. Vitamin D
  3. Vitamin C
  4. Vitamin K
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Correct answer: Vitamin D

Vitamin D deficiency reduces intestinal absorption of calcium and phosphorus, leading to hypocalcemia, bone demineralization, and osteomalacia in adults or rickets in children.

Difficulty: Medium Question 5 of 21

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