Vitamin D levels: higher is not better in old age

Higher levels of vitamin D are not beneficial to health of older men and may be harmful for some non-bone health outcomes, a study from NSW has shown.

The optimum range of serum 25 (OH)D is 50-75 nmol/L, according to a  survey of vitamin D levels in 1659 elderly men living in Sydney. And in a surprise finding, the study by Concord Hospital showed that taking vitamin D supplements had no effect on serum vitamin 25 (OH)D levels.

The study found that the average serum

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