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 & 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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