Vitamin D 1000 IU is an excellent source of vitamin D. Adequate vitamin D intake is important for ensuring normal calcium absorption and maintaining proper calcium plasma levels. Thus, vitamin D has a critical role in the development and maintenance of bones and teeth. Studies have shown that supplementation with high doses of vitamin D maximizes bone health in adults and may decrease the risk of fractures in the elderly.One of the main sources of vitamin D is from exposing skin to sunlight. However, this process can be limited by skin colour, sunscreen use, season and geographic location. People living close to the equator can easily produce vitamin D throughout the year, while those living farther away have to rely on foods and supplements for adequate vitamin D status. As few foods naturally contain high levels of vitamin D, supplementation is a great alternative to increase vitamin D levels.