Vitamin D Deficiency > Fact Sheets > Yale Medicine
https://www.yalemedicine.org/conditions/vitamin-d-deficiency
WEBWhen vitamin D levels are low and the body isn’t able to properly absorb calcium and phosphorus, there is an increased risk of bone pain, bone fractures, muscle pain, and muscle weakness. In older adults, severe vitamin D deficiency (levels less than 10 ng/mL) may also contribute to an increased risk of falls. What causes vitamin D deficiency?
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