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Why the Optimal Vitamin D Range May Be Higher

Could limiting vitamin D recommendations unintentionally limit the full spectrum of its health benefits? Key Points Optimal vitamin D levels may extend beyond the recommended 40–60 ng/mL range, with emerging evidence supporting a broader...

Who Is Most at Risk of Vitamin D Deficiency?

11 Key Factors That Influence Your Vitamin D Levels Key Points Vitamin D deficiency risk varies widely between individuals due to differences in sun exposure, lifestyle, biology, and overall health status. Certain factors—including limited...