Which of the following would be additional evidence that one of the functions of skin is the synthesis of vitamin D?
A)Vitamin D levels are higher in people who take supplements, such as multivitamins.
B)Vitamin D levels are lower in people who wear sunscreen.
C)Cancer rates are higher in people with more sun exposure.
D)People living in the tropics are vitamin D deficient.

Question

Quizplus · Accepted Answer

Wearing sunscreen blocks UVB rays which are needed for the synthesis of vitamin D. Therefore, people who wear sunscreen are likely to have lower levels of vitamin D, supporting the idea that skin synthesizes vitamin D. The other answer choices are not related to the synthesis of vitamin D by the skin.

Which of the Following Would Be Additional Evidence That One