BMJ Review: Calcium, Vitamin D Show Little Bone Benefit
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- BMJ review synthesized 69 randomized controlled trials covering 153,902 adults, comparing calcium alone, vitamin D alone, and combined supplements against placebo or no treatment for fracture and fall prevention.
- Researchers found little to no meaningful fracture-risk reduction from calcium (11 trials, 9,067 participants), vitamin D (36 trials, 92,045 participants), or combined supplementation (15 trials, 51,126 participants), with evidence rated moderate to high certainty.
- The analysis also showed little to no benefit for preventing hip fractures specifically or for reducing falls, and results held steady after accounting for age, sex, prior fractures, prior falls, and dietary calcium intake.
- Lead author Olivier Massé and colleagues in Canada concluded the evidence "does not support routine supplementation" and urged clinicians, guideline panels, and regulatory agencies to re-evaluate general recommendations for calcium and vitamin D.
- Despite prior mixed findings, vitamin D supplements with or without calcium continue to be widely recommended by healthcare providers and professional bodies, with prescriptions rising considerably in recent years, the authors note.
- A linked BMJ editorial argued that until better-powered trials clarify high-risk groups, funding and clinical attention should pivot toward proven strategies such as balance training, resistance exercise, and personalized fall-prevention programs.
- The authors cautioned the results may not apply to people with specific bone disorders or those receiving osteoporosis medication, and noted some sub-analyses included relatively few studies or participants.
Why it matters: Roughly one in three adults aged 65+ falls each year, and the authors are explicitly calling on guideline panels and regulators to reconsider routine calcium and vitamin D recommendations, potentially reshaping standard preventive advice given to millions of older adults and shifting clinical focus toward exercise-based fall prevention backed by stronger evidence.
