Which vitamin is also known as the "Sunshine" vitamin?

Vitamin D is commonly referred to as the "Sunshine" vitamin because it is produced by the body in response to sunlight exposure. When ultraviolet B rays from the sun hit the skin, they trigger the synthesis of vitamin D from cholesterol. This vitamin plays a crucial role in various bodily functions, particularly in promoting calcium absorption, which is essential for maintaining healthy bones and teeth.

The nickname arises from the fact that adequate sunlight exposure is one of the most effective ways to ensure sufficient levels of this important nutrient, distinguishing it from other vitamins that do not have a direct relation to sunlight. While the other vitamins listed are important for health, they do not have the same relationship with sunlight and are not associated with a nickname indicating such a connection.