What is the primary role of Vitamin D in the body?

The primary role of Vitamin D in the body is the absorption of calcium. Vitamin D is crucial for maintaining proper bone health because it enhances the intestinal absorption of calcium, which is essential for forming and maintaining strong bones. Without adequate Vitamin D, the body cannot effectively absorb calcium from food, leading to various bone health issues, such as osteomalacia in adults and rickets in children.

Additionally, Vitamin D also plays a role in regulating phosphate levels and has implications in immune function and inflammation, but its most established and critical function remains in facilitating calcium absorption. This direct link between Vitamin D and calcium absorption underlines its importance in preventing bone-related disorders and ensuring overall skeletal health.