Calcium and Vitamin D Supplements Show Minimal Impact on Reducing Falls and Fractures, Study Finds

A comprehensive review published in The BMJ indicates that calcium supplements, vitamin D supplements, or both combined provide little to no clinically significant benefit in preventing fractures or falls among most older adults.

Falls pose a significant health risk for seniors. Nearly one in three individuals aged 65 and older experiences a fall each year, and many of these events lead to fractures. Such injuries can cause pain, diminished independence, lower quality of life, and in some cases, the need for long‑term residential care. As populations age, preventing falls and fractures remains a key public health objective worldwide.

Previous reviews have already questioned the effectiveness of calcium and vitamin D supplements. Research generally finds no reduction in fracture risk from either supplement alone, while results for taking both together have been mixed. The role of vitamin D in decreasing falls has also remained uncertain.

Despite these uncertainties, vitamin D supplements (with or without calcium) continue to be widely recommended by healthcare providers, professional guidelines, and regulatory agencies for bone health, and prescriptions for these supplements have risen considerably in recent years.

Analysis of 69 Clinical Trials

To clarify the evidence, Canadian researchers analyzed data from 69 randomized controlled trials involving 153,902 adults. The studies compared calcium supplements, vitamin D supplements, or a combination of both against placebo or no treatment to assess whether they reduced the risk of falls and fractures.

Although the trials varied in quality, the researchers evaluated each study using established methods to assess potential bias and the certainty of the evidence.

After setting thresholds for what would constitute a clinically meaningful benefit, the team found little to no reduction in overall fracture risk from calcium supplements (moderate‑certainty evidence from 11 trials; 9,067 participants), vitamin D supplements (high‑certainty evidence from 36 trials; 92,045 participants), or combined supplementation (high‑certainty evidence from 15 trials; 51,126 participants).

The analysis also showed negligible benefit for preventing specific fractures, including hip fractures, or for reducing falls. These findings were supported largely by moderate to high‑certainty evidence.

Findings Hold Across Different Groups

The researchers note that some parts of the analysis included relatively few studies and participants, so the findings should be interpreted cautiously. They also caution that the results may not apply to people with certain bone disorders or those receiving medication for osteoporosis.

Additional analyses produced similar results even after accounting for factors such as age, sex, previous fractures, previous falls, and average calcium intake from food. According to the researchers, this consistency strengthens confidence in the overall conclusions.

Based on the available evidence, the authors conclude that the evidence “does not support routine supplementation with calcium or vitamin D, or combined supplementation to prevent fractures and falls.”

They further suggest that clinicians, guideline panels, and regulatory agencies “should re‑evaluate their general recommendations for calcium and vitamin D supplementation in light of current evidence.”

Focus May Shift to Proven Fall Prevention Strategies

In a linked editorial, the researchers emphasize the need for more rigorous and well‑powered clinical trials to guide recommendations for individuals at higher risk of fractures or falls.

Until then, they argue that resources and funding may be better directed toward strategies that have already demonstrated meaningful benefits, such as balance training, resistance exercise, and personalized fall prevention programs that combine exercise, hazard assessment, and education tailored to an individual’s specific risk factors.

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