Your body needs vitamin D to absorb calcium. For adults ages 19 to 70, the recommended intake of vitamin D according to the RDA is 600 international units (IUs) daily. This increases to 800 IUs daily for adults age 71 and older. Sources of vitamin D include oily fish, like salmon, trout, whitefish, and tuna. Additionally, mushrooms, eggs, and fortified foods, like milk and cereals, are also good sources of vitamin D. Sunlight also contributes to the body’s production of vitamin D. If you’re worried about getting enough vitamin D, ask your doctor about supplements. Getting adequate amounts of vitamin D from food or supplements may help protect bone health.