Much of the calcium or vitamin D the body makes comes from natural sources like sunlight and food. Doctors will usually recommend supplements if you have osteopenia and haven't yet broken a bone. Most adults need between 1000-2000mg of calcium and 600-800 international units (UI) of vitamin D daily. They are available in most drugstores, but if you are taking any other medications or have other health concerns, speak to a doctor before adding any supplements to your regimen.

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