One of the functions of skin is the synthesis of vitamin D. Which of the following would be evidence for this function?
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

Sunscreen blocks UVB radiation, the same radiation necessary for the synthesis of Vitamin D in the skin. Therefore, people who wear sunscreen are less likely to produce Vitamin D and have lower levels.

One of the Functions of Skin Is the Synthesis of Vitamin