Webber Naturals Vitamin D3 1000 IU, 500 Softgels, For Healthy Bones, Teeth, and the Maintenance of Good HealthVitamin D, also known as the sunshine vitamin, is a critical nutrient for immune function and the development and maintenance of healthy bones and teeth. D3 1000 IU from Webber Naturals contains the preferred cholecalciferol form of vitamin D. It helps the body absorb calcium and phosphorus, and is a factor in the maintenance of good health.