Micronutrients & recovery
Vitamin D supplementation (700-800 IU/d) reduces hip fracture risk in elderly individuals only when combined with calcium supplementation; vitamin D alone provides no significant benefit.
If you are over 50 and concerned about hip fractures, taking Vitamin D alone is likely ineffective. You need to combine 700-800 IU of Vitamin D with 1000-1200 mg of Calcium daily. This combination is most critical for those who are deficient or live in supervised settings where compliance is higher. For healthy community-dwelling individuals with good diet, the benefit may be minimal.
Our analyses... suggest that oral vitamin D appears to reduce the risk of hip fractures only when calcium supplementation is added.
Why this rating
Based on a meta-analysis of 9 RCTs involving 53,260 patients, providing high statistical power, though the primary comparison is indirect.
Source
Need for Additional Calcium to Reduce the Risk of Hip Fracture with Vitamin D Supplementation: Evidence from a Comparative Metaanalysis of Randomized Controlled Trials
Steven Boonen et al. · The Journal of Clinical Endocrinology & Metabolism · 2007
DOI 10.1210/jc.2006-1404
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