The requirement for vitamin D increases with age because

Question

Quizplus · Accepted Answer

As we age, all three factors mentioned in the answer options contribute to the increased requirement for vitamin D. The intestines lose their ability to absorb vitamin D, the kidneys lose their ability to convert it to the active form, and the skin’s ability to make it from sunlight decreases. Therefore, all the answer options A, B, and C are correct, making option D the best choice.

The Requirement for Vitamin D Increases with Age Because