A major analysis published in The BMJ concludes that taking supplements of calcium, vitamin D or both does not offer meaningful protection against falls or fractures for most older adults.
Scope and key findings of the review
Researchers screened randomized controlled trials to assess whether these widely used supplements prevent the two most important harms linked to ageing bones. The team included data from 69 randomized trials with a combined total of 153,902 participants. Trials compared calcium, vitamin D, or both with placebo or no treatment and evaluated outcomes including fractures and falls.
The authors judged the overall evidence as showing little to no clinically important benefit for the majority of older people. The findings call into question the practice of routinely recommending these supplements to prevent fractures and falls.
Why the question matters
Falls represent a major public-health burden for older adults. About one in three people aged 65 and older fall every year; such incidents can lead to fractures, long-term pain, loss of independence and, for some, transition to residential care.
Calcium is a structural element of bone, while vitamin D helps the body absorb calcium and supports bone metabolism. Because of these biological links and longstanding assumptions about their protective role, clinicians and guideline panels have often advised supplementation. Prescriptions and use of these products have increased substantially in recent years despite uncertainty about their effectiveness in preventing fractures.
What the analysis adds
By focusing on randomized trials — the strongest design for testing interventions — the review sought to reduce confounding that can bias observational studies. The included studies varied in quality; the research team evaluated risk of bias and graded the certainty of evidence using established methods.
The accumulated data did not demonstrate a consistent, meaningful reduction in fracture risk or in the likelihood of falling for most older adults taking calcium and/or vitamin D. That conclusion applies across many of the trials examined, although individual study results and quality differed.
Implications for practice and prevention
The findings suggest clinicians and public-health bodies should rethink blanket supplementation for bone-fracture prevention in older adults and focus more on alternative strategies known to reduce fall and fracture risk. Examples of such approaches include balance and strength training, home hazard reduction, vision correction and targeted management of medications that increase fall risk.
- Evidence base: 69 randomized trials, 153,902 participants
- Main outcomes: fractures and falls
- Overall result: minimal or no meaningful benefit for most older people
| Measure | Figure |
|---|---|
| Number of randomized trials | 69 |
| Total participants | 153,902 |
| Annual fall rate in those 65+ | ~1 in 3 |
What remains uncertain
The review does not close every question. Some patient groups — for example, people with proven severe vitamin D deficiency, those on medications that impair bone health, or individuals with specific conditions that affect absorption or metabolism — were not the primary focus of every included trial. For those patients, clinicians may still consider targeted testing and tailored supplementation.
Nevertheless, the broad conclusion is that routine supplementation for the general older population is unlikely to deliver the expected protection against falls and fractures and that limited benefits observed in past studies may not translate into clinically significant reductions at the population level.
Health-care providers, guideline committees and patients will now need to weigh these findings when deciding whether to continue or initiate calcium and vitamin D for fracture prevention. Emphasising proven fall-prevention measures and individual risk assessment may better serve older adults aiming to maintain bone health and independence.
