A study from Oregon State University finds 94.3% of Americans do not meet daily vitamin D requirements.
Experts highlight that persistent fatigue, even after adequate sleep, is the primary symptom of deficiency, which also affects bone health, immunity, and mood.
Doctors recommend adults consume 1,500–2,000 IU daily, but caution against excessive supplementation and advise consulting healthcare providers for personalized guidance, especially for pregnant women and children.
Why do top experts recommend nearly triple the official daily dose of vitamin D?
With experts disagreeing, are millions being mislabeled as vitamin D deficient?
Is your vitamin D supplement useless without two other essential nutrients?
Your deep bone pain may not be fibromyalgia, but this severe vitamin deficiency.
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How did modern life create a health crisis affecting 94% of Americans?