https://www.health.com/mind-body/calcium-and-vitamin-d-supplements
Is Taking Calcium and Vitamin D Together Safe?
Taking calcium and vitamin D supplements together is likely safe but not necessary if you eat a balanced diet. Both are essential for bone health.
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https://www.cbsnews.com/news/calcium-vitamin-d-supplements-broken-bones-study/
Should you really be taking calcium and vitamin D supplements? - CBS News
Dec 27, 2017 - New research analyzes the data on whether supplements actually protect against hip fractures and other broken bones in older adults
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