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Expert Guidelines: How Much D3 Should a Senior Take?

According to the National Institutes of Health (NIH), the recommended daily allowance (RDA) of vitamin D for adults over 70 is 800 International Units (IU), an increase over younger adults. This reflects the heightened nutritional needs of older adults, making it crucial to understand **how much D3 should a senior take** to support bone, muscle, and immune health.