Research
Micronutrients & recovery
Daily supplementation of 700–800 IU vitamin D3 combined with >1000 mg calcium reduces hip and nonvertebral fracture risk in older adults by approximately 20%.
If you are an older adult, taking 700-800 IU of Vitamin D3 daily along with at least 1000 mg of calcium can significantly lower your risk of breaking a hip or other bones. This combination is more effective than calcium alone.
GoodSupportsHIGH confidence
daily vitamin D supplementation (preferably 700–800 IU of vitamin D3) and adequate calcium intake (>1000 mg) reduce the risk for hip or nonvertebral fractures of older white U.S. and European subjects by slightly >20%, whereas calcium supplementation alone is largely ineffective.
Why this rating
Based on meta-analyses of randomized controlled trials, though the authors note variability in 25(OH)D measurement accuracy.
Source
Vitamin D and Health: Perspectives From Mice and Man
Roger Bouillon et al. · Journal of Bone and Mineral Research · 2008
DOI 10.1359/jbmr.080420
narrative_reviewCited 238×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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