What is the function of vitamin D in the body?

The function of vitamin D in the body is primarily to regulate calcium and phosphorus levels. Vitamin D facilitates the absorption of calcium from the intestines, which is crucial for maintaining healthy bones and teeth. It also plays a role in regulating the levels of phosphorus, another mineral essential for bone health, as well as for cellular functions and energy production.

When vitamin D levels are adequate, the body is better able to maintain calcium balance within the bloodstream and ensure that sufficient calcium is available for physiological processes. This regulation is essential because both calcium and phosphorus are vital for bone mineralization and strength. Deficiencies in vitamin D can lead to problems such as rickets in children and osteomalacia or osteoporosis in adults, highlighting its key role in bone health through calcium and phosphorus regulation.