2,000 IU. Bone & joint health. Supports strong bones & teeth. Vitamin d3 is a fat-soluble vitamin that helps maintain healthy bones by stimulating the absorption of calcium in the body. The body has the ability to make vitamin D3 naturally when exposed to sunlight. During the winter months, however, the body's vitamin D3 stores are low, increasing the risk of deficiency. Sunscreens also block the body's ability to make vitamin D3 from sunlight. Vitamin D3 deficiency can contribute to accelerated bone loss and reduced calcium utilization. Recently, research shows higher intakes of vitamin d3 may support overall cellular health. Our vitamin d3 2,000 IU provides this key nutrient in a small softgel, making it easy to swallow.