What is a primary function of Vitamin D in the body?

Vitamin D plays a critical role in the body, and one of its primary functions is assisting in calcium absorption. This process is essential for maintaining healthy bones and teeth. When the body is exposed to sunlight, it synthesizes Vitamin D, which then promotes the absorption of calcium and phosphorus from the diet through the intestines. Adequate levels of Vitamin D are necessary to ensure that enough calcium enters the bloodstream, which is vital for various bodily functions, including bone mineralization and strength.

While Vitamin D may have some impact on hormone regulation and overall health, its most well-established role revolves around calcium metabolism and skeletal health. This makes the function of assisting in calcium absorption the most pertinent and primary role of Vitamin D within the body.