Postmenopausal women saw significant improvement in bone health after taking calcium supplements, but a placebo-controlled study failed to show that vitamin D by itself reduced risks of osteoporosis or bone turnover, researchers from Winthrop University Hospital reported on the website of the Journal of Clinical Endocrinology and Metabolism. Lead author Dr. John Aloia said the study suggests vitamin D supplements in doses beyond daily recommendations "do not protect bone health, whereas calcium supplements do have an effect."

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