What is one beneficial effect of UV rays on the skin?

One beneficial effect of UV rays on the skin is their role in the production of vitamin D. When skin is exposed to UVB rays, it triggers a biochemical process that allows the body to synthesize vitamin D, which is essential for several bodily functions, particularly for maintaining healthy bones and a robust immune system. Vitamin D helps regulate calcium and phosphorus in the body, which are crucial for maintaining bone density and overall health.

While increased melanin production can be seen as a protective response to UV exposure, it does not represent a direct benefit like vitamin D synthesis does. Additionally, sunburn is a harmful consequence of excessive UV exposure, and decreased collagen levels reflect skin damage related to prolonged UV exposure, indicating that UV rays can have detrimental effects when not properly managed.