A review of 69 randomised controlled trials covering 153,902 adults found that calcium, vitamin D, and the two combined offer little to no clinically meaningful protection against broken hips or falls for most older people. “Based on absolute risk reductions and thresholds considered clinically meaningful, this review found little to no benefits with calcium, vitamin D or combined supplements on fracture and fall prevention,” wrote Olivier Massé, a pharmacist at Sacred Heart Hospital of Montreal who led the analysis, and his colleagues. Almost a third of adults aged 65 and older fall each year, and those falls are the reason the question mattered enough to review at this scale.
Massé’s team assessed calcium supplements, vitamin D supplements, and combined supplementation separately, comparing each against a placebo or no treatment across trials that ran a mean follow-up of two to nearly three years. They defined a benefit as clinically meaningful only above specific thresholds set in advance, such as at least a 2% reduction in the risk of any fracture, a bar designed to separate a real effect from statistical noise.
Vitamin D’s High-Certainty Verdict Came From 92,045 People
The strongest single result in the review came from vitamin D alone: high-certainty evidence drawn from 36 trials involving 92,045 participants showed no meaningful reduction in fracture risk, and no effect on the risk of falls either. Calcium supplements produced a similar null result from a smaller pool, moderate-certainty evidence from 11 trials and 9,067 participants, and combined calcium-and-vitamin-D supplementation showed little to no benefit across 15 trials and 51,126 participants, this time backed by high-certainty evidence as well.
ScienceDaily’s summary of the review notes that combined supplementation was tied to a slightly reduced fracture risk in the raw numbers, including hip fractures specifically, but the researchers wrote that none of those reductions cleared the bar they had set in advance for a clinically meaningful benefit. That distinction is the difference between a number moving in the right direction and a number moving far enough to change what a doctor should tell a patient.
Hip Fractures and Falls Got the Same Null Result
Specific fracture types, including hip fractures, and falls themselves showed the same pattern across the pooled data, largely on moderate to high certainty of evidence. Massé and his co-authors acknowledged that some of the sub-analyses relied on a smaller number of trials and participants, so those particular results should be read with more caution than the pooled totals covering all 153,902 adults.
The conclusions held up after the team reran the analysis accounting for participant age, sex, history of prior fractures and falls, and average dietary calcium intake. Consistency across that many adjustments is what let the researchers describe their findings as strong enough to challenge routine supplementation, rather than a fragile result that might vanish under a different set of assumptions.
An Editorial Author Wants the Money Redirected to Exercise
In a linked editorial, Dr. Guylène Thériault, a clinical lecturer at the University of Montreal, wrote that calcium and vitamin D supplementation had been treated for years as an “effortless and inexpensive” fix for fracture prevention, and that the new meta-analysis shows that framing was wrong. “There is good evidence showing that exercise focusing on balance and strength, or interventions combining this exercise, home hazard assessment, or education with other interventions tailored to risk assessment offer meaningful reduction in risk,” Thériault told the medical outlet Healio.
Thériault said efforts should now focus on better funding and implementation of those interventions, which may need an interdisciplinary, team-based approach rather than a prescription pad. She also flagged a real limit on what the review can say: data on supplementation in certain high-risk groups, including people with confirmed vitamin D deficiency, those with a previous fracture, and older adults living in nursing homes, remain limited, and any future trials should target those populations specifically.
The Findings Challenge Years of Default Medical Advice
Massé and his colleagues went further than simply reporting a null result. They wrote that their findings “do not support routine supplementation with calcium, vitamin D or combined supplementation to prevent fractures or falls,” a direct challenge to years of default advice handed out in primary care offices, where a vitamin D prescription has often been the easy, low-risk answer to a patient’s bone-health question even as prescriptions kept rising.
The review does not claim vitamin D and calcium are harmful, only that the fracture-prevention case for taking them routinely has not held up under this scale of scrutiny, drawn from trials published in The BMJ. For the millions of older adults already taking one or both supplements on a doctor’s advice, the honest next step the researchers point to is a conversation about whether that advice was ever built on evidence this specific, rather than a reflexive refill.
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This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
