Which vitamin is produced in the skin upon UV exposure?

The vitamin produced in the skin upon exposure to ultraviolet (UV) light is Vitamin D. When the skin is exposed to UV radiation from the sun, a chemical reaction begins that converts a cholesterol derivative in the skin into cholecalciferol, or vitamin D3. This process is crucial because Vitamin D plays a vital role in various bodily functions, including maintaining calcium and phosphorus balance, supporting bone health, and enhancing the immune system.

Vitamin D can also be synthesized through dietary sources, but the skin's ability to produce it through sunlight is a significant factor in maintaining sufficient levels for overall health. This ability underscores the importance of moderate sun exposure for the synthesis of this essential nutrient.