Vitamin D supplements don’t help prevent chronic diseases unrelated to the bones, according to a review of published research that challenges the prevailing wisdom held by proponents. While scientific evidence supports the importance of vitamin D for bone health, its benefits in reducing the risk of diseases ranging from cancer to heart disease as shown in 290 observational studies were largely unconfirmed in 172 randomized controlled trials, experiments considered the gold standard for establishing causal links, according to the review published today in The Lancet Diabetes & Endocrinology medical journal.
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