Vitamin D is commonly referred to as the "sunshine vitamin," but many people do not spend enough time outdoors to obtain this benefit. The body manufactures vitamin D when the skin is exposed to sunlight; therefore, it is recommended that people living in northern latitudes, not exposed to the sunlight or who use sunscreen should supplement with the nutrient. Even though the RDA is set at 600 IU, many experts now recommend up to 2,000 IU, especially for those at risk for deficiency such as the elderly, dark-skinned individuals, night shift workers, those living in the northern latitudes or that lack sun exposure, and those who do not consume enough vitamin D-rich foods.