What common name is given to Vitamin D due to its synthesis from sunlight?

Vitamin D is commonly referred to as the Sunshine Vitamin due to its unique ability to be synthesized by the skin when exposed to ultraviolet (UV) rays from sunlight. This process begins when UVB rays penetrate the skin, prompting a chemical reaction that converts a cholesterol derivative in the skin to vitamin D3. This natural synthesis is significant because it allows the body to produce vitamin D without dietary intake, highlighting the importance of sun exposure for maintaining adequate levels of this vitamin.

The term "Sunshine Vitamin" is well-recognized in both scientific and general contexts, making it an appropriate descriptor for vitamin D. This nickname emphasizes the connection between sunlight and the body's ability to create this essential nutrient, which plays a critical role in bone health, immune function, and overall wellness.