Vitamin D is vital to health and various lifestyle factors affect vitamin D status. Diminished time outside, frequent use of sunscreen, and living at latitudes with scarce winter sunlight can all negatively affect vitamin D levels. Vitamin D3 5000 IU supports the body’s ability to absorb and retain both calcium and phosphorus — essential minerals for healthy bone integrity.* Vitamin D also plays a role in mood balance and immune health.* Formulated for purity.