Vitamin D 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 D naturally when exposed to sunlight. During the winter months, however, the body's vitamin D stores are low, increasing the risk of deficiency. Sunscreens can also block the body's ability to make vitamin D from sunlight. Vitamin D deficiency can contribute to accelerated bone loss and reduced calcium utilization. Recently, research shows higher intakes of vitamin D may support overall cellular health. Our Vitamin D3 5,000IU provides a vegetarian source of this key nutrient as a scored tablet - which means you can choose between a 5,000IU dose or you can break the scored tablet in half to consume 2,500IU.