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For a long time, the Mayo Clinic claimed vitamin D supplementation to combat SARS infections had no scientific proof and was possibly dangerous.

If such an authoritative source claims pseudo science and danger, your annecdote could very well be true.

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Low vitamin D reduces correct responses by the immune system, and contributes to autoimmune disorders and results in higher possibility of infection.

It's not a surprise that fundamental health improves outcomes against novel infections. Public health should be encouraging significant evidence-based habits routinely.

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