Does Vitamin D Benefit Only Those Who Are Deficient?

Does Vitamin D Benefit Only Those Who Are Deficient?

There is a significant inverse relationship between concentrations of circulating 25­-hydroxy­-vitamin D (25[OH]D) and all-cause mortality, but only in people with vitamin D deficiency, suggests a new large-scale analysis. Data on more than 380,000 participants gathered from 35 studies showed…

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