What stimulates the production of melanin in the skin?

• A. Low temperatures
• B. Genetics
• C. Exposure to sunlight
• D. Dietary choices

Answer: (C)

The production of melanin in the skin is primarily stimulated by exposure to sunlight. When the skin is exposed to ultraviolet (UV) rays from the sun, it triggers melanocytes—cells responsible for producing melanin—to increase melanin production. This process serves as a natural defense mechanism, as melanin absorbs harmful UV radiation, protecting the skin from damage and reducing the risk of skin cancer.

While genetic factors do influence an individual's baseline melanin levels and skin color, it is the direct exposure to sunlight that actively stimulates increased melanin production in response to UV radiation. Dietary choices may have some impact on skin health, but they do not have a direct role in stimulating melanin production. Low temperatures also do not significantly affect melanin production, as the stimulation is primarily driven by UV exposure.