Researchers looked at 23 different studies involving over 70,000 people aged 50 and older to see if taking calcium supplements could help prevent broken bones. They found that calcium supplements did reduce the overall risk of fractures and specifically helped prevent breaks in areas like the arms and legs (non-hip fractures). However, calcium didn’t seem to make a big difference for spine or hip fractures. The amount of calcium taken and how long people took it mattered for the results. This suggests calcium supplements may be helpful for bone health in older adults, but they’re not a complete solution for all types of fractures.

The Quick Take

  • What they studied: Whether taking calcium pills helps older people avoid broken bones
  • Who participated: Over 70,000 people aged 50 and older from 23 different research studies. Some took calcium supplements while others took fake pills or nothing.
  • Key finding: Calcium supplements reduced the overall risk of fractures by about 7% and reduced non-hip fractures by about 7%. However, they didn’t significantly help prevent hip or spine fractures.
  • What it means for you: If you’re over 50, calcium supplements may help reduce your overall fracture risk, especially for breaks in your arms and legs. However, they shouldn’t be your only strategy—exercise, vitamin D, and fall prevention are also important. Talk to your doctor about whether calcium supplements are right for you.

The Research Details

This was a meta-analysis, which means researchers combined results from 23 different high-quality studies (called randomized controlled trials) to get a bigger picture. In these studies, some older adults took calcium supplements while others took placebo pills (fake pills) or nothing at all. The researchers tracked these people over time to see who broke bones and who didn’t.

The studies included people aged 50 and older, and some people also took vitamin D while others didn’t. The researchers looked at different types of fractures: total fractures (all breaks combined), spine fractures, non-spine fractures (like arms and legs), and hip fractures specifically.

By combining all these studies together, the researchers could see patterns that might not show up in just one study. This approach is considered very strong evidence because it uses data from tens of thousands of people.

This research approach is important because individual studies can sometimes give different results by chance. By combining 23 studies with over 70,000 people, the researchers could see the true effect of calcium supplements more clearly. This type of combined analysis gives us much more reliable information than any single study could provide.

This study is considered high-quality evidence (Level I) because it combined results from randomized controlled trials, which are the gold standard in medical research. The large number of participants (70,837) makes the results more trustworthy. However, the studies included varied in how much calcium people took and how long they took it, which could affect the results.

What the Results Show

Calcium supplements showed a modest but real benefit for preventing fractures overall. The risk of breaking any bone was reduced by about 7% in people taking calcium compared to those not taking it. For non-hip fractures (breaks in areas like the wrist, arm, or leg), calcium also reduced risk by about 7%.

However, the benefits weren’t the same for all types of fractures. For spine fractures, calcium showed a trend toward helping but the difference wasn’t strong enough to be certain it actually works. For hip fractures specifically, calcium didn’t show a clear benefit.

The amount of calcium people took mattered. Higher doses seemed to work better for preventing overall fractures. How long people took the supplements also affected results—longer follow-up periods sometimes showed different outcomes.

The research found that certain factors changed how well calcium worked. People who had broken bones before seemed to benefit more from calcium supplements. The dose of calcium was important—people taking more calcium had better results. The length of time people were followed in the studies also mattered, especially for hip fractures. Whether people also took vitamin D didn’t seem to change the main results, though vitamin D is still important for bone health.

This research confirms what many previous studies have suggested: calcium supplements provide modest protection against fractures in older adults. The finding that calcium helps with non-hip fractures but not hip fractures aligns with earlier research. This meta-analysis provides stronger evidence than individual studies because it combines data from so many people.

The studies included had some differences in how much calcium people took and for how long, which can affect results. Some studies used different types of calcium supplements. The research couldn’t prove that calcium alone prevents fractures—other factors like exercise, vitamin D, and fall prevention also matter. The benefit of calcium, while real, is modest (about 7% reduction), so it’s not a complete solution. Hip fractures, which are the most serious type, didn’t show clear improvement with calcium alone.

The Bottom Line

If you’re over 50, calcium supplements may help reduce your fracture risk, especially for non-hip breaks. A moderate dose (around 1,000-1,200 mg daily) appears effective based on this research. However, calcium should be part of a complete bone health plan that includes vitamin D, weight-bearing exercise, and fall prevention. Talk to your doctor before starting supplements, especially if you have kidney problems or take certain medications.

This research is most relevant for people over 50, especially women after menopause and men over 70 who are at higher risk for fractures. People with a history of broken bones may benefit most. However, people with kidney disease, those taking certain medications, or those with calcium metabolism problems should consult their doctor first.

Bone health improvements take time. Most studies followed people for several years to see fracture prevention benefits. You shouldn’t expect immediate results—think of calcium supplements as a long-term investment in bone health. Consistent use over months and years is what matters.

Want to Apply This Research?

  • Track daily calcium intake (target: 1,000-1,200 mg) and log it in your app. Include both supplements and dietary sources like dairy, leafy greens, and fortified foods. Monitor this weekly to ensure consistency.
  • Set a daily reminder to take your calcium supplement at the same time each day (ideally with a meal for better absorption). Also track complementary habits: vitamin D intake, weight-bearing exercise minutes, and fall prevention activities like balance exercises.
  • Create a monthly bone health scorecard tracking: calcium supplement adherence (%), vitamin D intake, exercise frequency, and any falls or injuries. Review quarterly to identify patterns and adjust your routine. Share results with your healthcare provider annually.

This research suggests calcium supplements may help reduce fracture risk in older adults, but results are modest and vary by fracture type. Calcium supplements are not a complete solution and should be combined with vitamin D, exercise, and fall prevention. This information is for educational purposes only and should not replace medical advice. Consult your healthcare provider before starting calcium supplements, especially if you have kidney disease, take medications that interact with calcium, or have other health conditions. Individual results vary based on age, overall health, diet, and lifestyle factors.