What is the primary role of melanin in the skin?

Melanin's primary role in the skin is to protect against UV radiation. This pigment is produced by melanocytes and is responsible for the coloration of the skin, hair, and eyes. When skin is exposed to ultraviolet rays from the sun, the body responds by producing more melanin, which helps absorb and dissipate the harmful effects of UV radiation. By doing so, melanin acts as a natural barrier, reducing the risk of DNA damage that can lead to skin cancer and other related skin conditions.

Other options refer to functions that are not primarily associated with melanin. For instance, while hydration is essential for skin health, it is managed by different substances such as natural moisturizing factors and lipids. Temperature regulation is primarily achieved through mechanisms like blood flow and sweat production, rather than melanin. Similarly, providing strength to the skin is more closely associated with collagen and elastin, which are structural proteins that help maintain skin firmness and elasticity. Thus, melanin's main function is clearly linked to its protective role against UV radiation.