Vitamin D

surging  vitamin D — claims outrun the trial evidence

⚠ Safety in context

Evidence by outcome

bone healthgrade Bmoderate certaintysupports bone density and reduces fracture risk with calcium, mainly in deficiency
moodgrade Clow certaintysmall mood benefit, mostly in people who are deficient
immune functiongrade Clow certaintymodest reduction in acute respiratory infection risk, concentrated in deficient people

People say · Evidence shows

Vitamin D fixes almost everything

aheadlargemarketing claim

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sources: PMID:20000104 · PMID:00000005 · PMID:20000105