Quick answer: A large study published September 30, 2026, in Scientific Reports found that adults aged 50 and older with vitamin B12 deficiency had a 33% higher hazard of fracture than those with normal B12 levels. The study was observational, so it shows an association, not proof that low B12 causes fractures or that B12 supplements prevent them.
When we think about the nutrients needed for strong bones, calcium and vitamin D usually get all the attention. Magnesium and vitamin K are finally getting some well-deserved recognition, too. But what about vitamin B12? This essential vitamin is best known for supporting healthy nerves, red blood cells, and brain function. Yet fascinating new research suggests that B12 status may also be an important piece of the bone health puzzle.
A large study published September 30, 2026, in Scientific Reports followed more than 230,000 adults aged 50 and older and found that people with vitamin B12 deficiency had a 33% higher hazard of experiencing a fracture than those with normal B12 levels. That’s a finding worth paying attention to!
Does this mean taking extra B12 will prevent osteoporosis or fractures? Not necessarily. But it reinforces something I have emphasized throughout my more than 40 years of studying bone health:
Our bones do not exist in isolation. They are part of a remarkable, interconnected system, and what affects our overall health often affects our bones as well. (I explored a similar theme in Bone Density and Brain Health.) Let’s look at what the researchers discovered and what we can learn from it.
A Study of 231,000 Adults Reveals an Important B12 Connection
Researchers examined electronic health records from the TriNetX Global Collaborative Network, which includes health information from multiple healthcare systems. They focused on adults aged 50 and older who had undergone blood testing for vitamin B12. Participants were divided into two groups:
- B12 deficient: Blood levels of 199 pg/mL or lower.
- Normal B12: Blood levels between 300 and 900 pg/mL.
Using a statistical method called propensity score matching, the researchers compared 115,735 individuals with B12 deficiency against an equal number with normal B12 levels. The groups were matched on numerous recorded health characteristics to help reduce differences that could influence the results. The researchers also excluded individuals who experienced fractures during the first year after their B12 measurement, then evaluated subsequent fracture outcomes.
What did they discover?
The results were striking. Adults with vitamin B12 deficiency experienced a 33% higher fracture hazard over the study’s full analytic period. When the researchers focused on the first five years after the initial one-year exclusion period, the association was even stronger, with a 37% higher fracture hazard.
Importantly, these percentages describe relative hazard, not the absolute probability that an individual will break a bone. The study also explored falls, osteoporosis diagnoses, and osteoporotic fractures, with findings generally pointing in the same direction.
However, because this was an observational study, we cannot conclude that B12 deficiency itself caused the fractures. And that distinction is important. The researchers did not have information on several major influences on bone health, including bone density, vitamin D status, calcium intake, muscle strength, and physical activity.
Still, I find this research particularly interesting because it encourages us to look beyond the usual suspects when evaluating fracture risk.
Why Might Vitamin B12 Matter for Bone Health?
I often remind people that osteoporosis is not simply a calcium deficiency disease. Healthy bones depend on an entire network of nutrients, hormones, muscles, nerves, digestive processes, and lifestyle factors working together (see my overview of the 20 key bone nutrients). Vitamin B12 may influence several parts of this network.
1. Vitamin B12 Supports Healthy Nerves and Balance
One of the most important functions of vitamin B12 is maintaining a healthy nervous system. A significant B12 deficiency can damage nerves and contribute to symptoms such as:
- Tingling or numbness in the hands and feet
- Difficulty walking
- Poor coordination or balance
- Weakness and fatigue
- Cognitive changes
Now think about what these symptoms might mean for someone who already has osteoporosis. Even if their bone density remains unchanged, a decline in balance or walking ability could increase their likelihood of falling. And as I frequently emphasize, preventing fractures means paying attention to both bone strength and fall risk. A strong skeleton is important, but so is the ability to move confidently and safely through the world.
This is one possible explanation for the connection between B12 deficiency and fractures, although the new study did not establish that nerve problems or falls mediated the association.
2. Vitamin B12 Plays a Role in Cellular Health and Bone Metabolism
Our bones are living, metabolically active tissues. Every day, specialized cells break down old bone and build new bone in its place. This ongoing process, known as bone remodeling, is essential for maintaining skeletal strength.
Vitamin B12 is involved in DNA synthesis and normal cellular function, and researchers have investigated its possible relationship with bone-forming cells. B12 also participates in the metabolism of homocysteine, an amino acid that can accumulate when certain B vitamins are inadequate. Elevated homocysteine has been associated with fracture risk in some studies, and researchers have proposed possible effects on collagen and bone quality.
However, the biology is complicated. Clinical trials have not consistently shown that lowering homocysteine with B vitamins prevents fractures. So while these mechanisms are scientifically interesting, we should not mistake a plausible explanation for proof of benefit. The larger lesson is that adequate nutrition supports the many biological processes involved in maintaining healthy bones.
3. Vitamin B12 Deficiency May Be a Clue to Poor Nutrient Absorption
This is perhaps the connection I find most important. As we age, our ability to absorb certain nutrients can change. Vitamin B12 is especially interesting because absorbing it from food requires several carefully coordinated digestive steps. Stomach acid helps release B12 from food proteins, and a substance called intrinsic factor is necessary for its absorption farther along the digestive tract. Conditions that interfere with these processes can lead to deficiency even when someone appears to be eating a healthy diet.
Certain medications, including long-term acid-suppressing drugs and metformin, can also contribute to low B12 status. This does not mean anyone should stop taking a prescribed medication. It means that people using these medications may benefit from discussing B12 monitoring with their healthcare providers.
In my Better Bones program, I have always considered digestion and nutrient absorption essential aspects of bone health. After all, it’s not only what we eat that matters. It’s also what our bodies can digest, absorb, and use.
Why Vitamin B12 Deficiency Becomes More Common With Age
Vitamin B12 deficiency deserves special attention in older adults because several risk factors become more common with aging. These include reduced stomach acid production, certain gastrointestinal conditions, medication use, and changes in dietary patterns. People who follow vegan diets also need a reliable source of B12 from fortified foods or supplements, because naturally occurring B12 is found primarily in animal-derived foods.
An additional challenge is that B12 deficiency may develop gradually. Some people experience fatigue or neurological symptoms before the problem is recognized. Others may have few obvious symptoms. And neurological complications can sometimes occur even without the classic anemia associated with B12 deficiency. This is one reason I encourage people to be curious about their health rather than assuming that every new symptom is simply a normal part of aging. For more background, see the NIH Office of Dietary Supplements vitamin B12 fact sheet.
Should You Have Your Vitamin B12 Tested?
If you have osteoporosis, have experienced unexplained falls, or have symptoms suggestive of B12 deficiency, I believe it is reasonable to discuss your B12 status with your healthcare practitioner. Testing may be especially relevant if you:
- Are an older adult with risk factors for poor absorption
- Follow a vegan or highly restricted diet
- Use metformin or long-term acid-suppressing medication
- Have a digestive disorder or history of gastrointestinal surgery
- Experience unexplained numbness, tingling, weakness, or balance difficulties
- Have anemia or other laboratory findings that raise concern about B12 status
A standard serum B12 blood test is often the starting point. In certain situations, additional testing, such as methylmalonic acid (MMA), may help clarify whether a functional B12 deficiency is present. The appropriate interpretation depends on your symptoms, medical history, laboratory findings, and sometimes kidney function. (See also my guide to diagnostic tests for the causes of osteoporosis.)
I would not suggest that every person with osteoporosis automatically needs high-dose B12 supplementation. Instead, I encourage an individualized approach: identify your nutritional needs, look for possible deficiencies, and address the underlying causes with appropriate professional guidance.
How to Support Healthy Vitamin B12 Levels Naturally
Eat a Nutrient-Rich, pH-Balanced Diet
My nutritional philosophy has always centered on a whole-food, mineral-rich, pH-balanced diet. I recommend generous servings of alkaline-forming foods, particularly vegetables, fruits, nuts, and seeds, combined with adequate amounts of clean, high-quality protein. Vitamin B12 itself is found primarily in animal-derived foods, including:
- Fish and seafood
- Eggs
- Poultry
- Meat
- Dairy products
For those who avoid animal products, fortified foods and appropriate B12 supplements are important options. Remember, a healthy bone-building diet isn’t about eating only alkaline-forming foods. It’s about creating nutritional balance and ensuring that the body receives all the essential nutrients it needs.
In my approach, I also encourage tracking first-morning urine pH as one tool for exploring dietary acid-alkaline balance. However, urine pH does not measure vitamin B12 or mineral status and cannot diagnose nutrient deficiencies.
Don’t Overlook Digestion
If your body is not absorbing nutrients efficiently, even an excellent diet may fall short. For individuals with low B12, it’s important to understand why the deficiency developed. Is it related to dietary intake? Medication use? A digestive condition? An absorption problem? Correcting the underlying cause is just as important as restoring the nutrient itself.
Consider Supplementation When Appropriate
Some people can maintain adequate B12 levels through food alone, while others benefit from supplementation. And for individuals with significant absorption problems, higher-dose oral supplementation or B12 injections may be recommended by their healthcare provider.
Our Rise Well Vegan B12 Lozenges are one option for those looking for supplemental B12 support. But I always encourage you to choose supplements based on your individual needs rather than assuming more is automatically better. Most importantly, remember that supplementation has not been proven by this new study to reduce fracture risk.
Strong Muscles, Good Balance, and Healthy Bones Work Together
One of my favorite principles in bone health is that our muscles and bones function as a coordinated unit. When muscles become stronger, they place healthy mechanical demands on the skeleton. Weight-bearing activity and resistance exercise can help maintain bone and muscle strength. Balance training also helps reduce fall risk, an especially important consideration for people with osteoporosis.
And here is where the B12 conversation becomes even more interesting. If a nutrient deficiency contributes to nerve dysfunction, weakness, or impaired coordination, it may affect the very systems we rely on to protect ourselves from falling. That’s why I encourage a comprehensive bone-building program that includes appropriate exercise, nutritional assessment, and fall-prevention strategies.
For additional perspective, read my article Could Osteoporosis Be a Blessing in Disguise?, where I discuss shifting our attention from fear of bone loss toward building strength and taking meaningful action.
What This New Research Really Tells Us
I am encouraged to see researchers investigating the broader nutritional and physiological factors associated with fracture risk. For far too long, the conversation around osteoporosis has focused primarily on bone density scores. But a DEXA scan does not tell us everything about a person’s nutritional status, digestive health, muscle function, balance, or risk of falling. This study reminds us that there may be important clues outside the skeleton itself.
At the same time, we must respect what the research can and cannot tell us. The participants were people who had undergone B12 testing during medical care, so the results may not apply equally to all older adults. Their B12 status was measured only once, and the researchers could not account for every factor that influences fractures. We therefore cannot conclude that B12 deficiency directly causes fractures, or that giving B12 supplements will prevent them.
What we can say is that low B12 was associated with a meaningfully higher fracture hazard in this large group of older adults. That is enough to warrant further investigation and thoughtful attention to B12 deficiency when clinically appropriate.
My Takeaway: Look at the Whole Person, Not Just the Bones
After more than four decades working in the field of natural bone health, I have come to appreciate how often the body gives us clues about what it needs. A low bone density reading may be one clue. Muscle weakness may be another. Digestive difficulties, inadequate nutrition, or a vitamin deficiency may also deserve attention. The key is to connect these pieces rather than treating each one as an isolated problem.
This new vitamin B12 research fits beautifully into that broader perspective. It does not offer a magic pill for osteoporosis. But it does encourage us to ask better questions. Are we absorbing our nutrients adequately? Are our muscles and nerves functioning well? Are we doing everything we reasonably can to support both bone strength and balance? And most importantly, are we looking for the underlying factors that may be contributing to our individual bone health challenges? I believe that is where meaningful progress begins.
Frequently Asked Questions About Vitamin B12 and Bone Health
Does vitamin B12 deficiency cause fractures?
Not proven. A large observational study found that adults aged 50 and older with B12 deficiency had a 33% higher fracture hazard, but it shows an association and cannot establish cause and effect.
Will taking vitamin B12 supplements prevent fractures?
The new study did not show that. Supplementation has not been proven by this study to reduce fracture risk, and supplements should be chosen based on individual needs and professional guidance.
What level of vitamin B12 counts as deficient in this study?
The researchers defined deficiency as a blood level of 199 pg/mL or lower, and normal as 300 to 900 pg/mL.
Who should consider getting their B12 tested?
People with osteoporosis, unexplained falls, vegan or restricted diets, long-term acid-suppressing medication or metformin use, digestive disorders, or symptoms such as numbness, tingling, or balance problems may wish to discuss testing with their healthcare practitioner.
Ready to Build Stronger Bones Naturally?
If you’re wondering how vitamin B12 fits into the larger picture of bone health, I invite you to explore my Better Bones Solution Online Masterclass. This comprehensive program brings together the principles I’ve developed through more than 40 years of bone health research and clinical nutrition experience.
You’ll discover my six essential steps to building stronger bones naturally, including understanding your individual case, following an alkaline-forming diet, identifying key bone nutrients, improving digestion, exercising safely, and supporting mind-body resilience. With more than 18 hours of instruction, a 108-page workbook, and lifetime access, you’ll have the tools to develop a personalized, practical bone health program.
Explore Dr. Brown’s Better Bones Solution Masterclass
Because building stronger bones isn’t about finding one miracle nutrient. It’s about giving your entire body the support it needs to thrive.
To your better bones and vibrant health,
Dr. Susan E. Brown, PhD
Scientific Reference
Yang C-P, Chang L-C, Pang Y-L, Chen J-Y, Hung K-C. Vitamin B12 status and long-term fracture risk in a multicenter propensity score–matched cohort. Scientific Reports. Published online September 30, 2026. DOI: 10.1038/s41598-026-74010-8
This article is intended for educational purposes only and does not constitute medical advice. Always consult your qualified healthcare practitioner before changing your medications, supplements, or treatment plan.
