Do vegans have higher fracture risk?
Summary
Not for most vegans — and where risk exists it's about specific, avoidable nutrients, not plant-based eating itself. EPIC-Oxford found higher fracture rates in vegans, but the excess tracked three factors that clustered together in that cohort: low calcium intake, low protein intake, and low body weight. Vegans who got adequate calcium and protein and weren't underweight had risk close to meat-eaters. (The often-quoted "131% higher hip fracture" is a relative figure on a small absolute base — very roughly 15 extra hip fractures per 1,000 people over 10 years.) Get enough calcium, vitamin D, and protein, stay a healthy weight, and do some weight-bearing exercise — which a varied vegan diet with fortified foods handles routinely — and bone health is a normal, achievable outcome, not a fraught project.
Supported by 1 cited source
Key Points
- 1The EPIC-Oxford study (Tong et al., 2020, n=54,898, 17.6-year follow-up) found that vegans had significantly higher fracture risk compared to meat-eaters: total fractures HR 1.43 (95% CI 1.20-1.70) and hip fractures HR 2.31 (95% CI 1.66-3.22). In absolute terms this is very roughly 15 extra hip fractures per 1,000 vegans over 10 years — a real but modest increase on a low base, and one plausibly driven mostly by the modifiable factors below (calcium, protein, and body weight).
- 2A critical finding often omitted: when the analysis was restricted to participants consuming 700mg+ calcium per day, vegan fracture risk was STILL significantly elevated at HR 1.50 (95% CI 1.12-1.99). This means calcium intake alone explains only about 28% of the excess fracture risk. Other factors — including protein intake, vitamin D status, BMI (vegans tend to have lower BMI, which reduces mechanical loading on bones), vitamin B12, and overall dietary patterns — also contribute.
- 3Below the 525mg/day calcium threshold, fracture risk was substantially higher. This suggests a dose-response relationship where very low calcium intake is particularly harmful, but achieving adequate calcium is necessary without being sufficient for full fracture risk reduction.
- 4Bone health is multi-factorial. Key factors for vegans to address include: (1) Calcium — aim for 700-1000mg/day from fortified plant milks, tofu set with calcium sulfate, kale, broccoli, and supplements if needed; (2) Vitamin D3 — critical for calcium absorption, supplement year-round especially at northern latitudes; (3) Protein — adequate protein supports bone matrix formation, aim for at least the RDA and consider 10-20% more to compensate for lower plant protein digestibility; (4) Vitamin B12 — deficiency is associated with lower bone mineral density; (5) Weight-bearing exercise — resistance training and impact exercise directly stimulate bone formation.
- 5B12 is the one essential vegan supplement; calcium, vitamin D, and protein come from ordinary fortified foods and varied eating, and a simple vegan multivitamin can conveniently cover vitamin D if sun exposure is limited. Supplements are only part of the picture — calcium-rich foods, adequate protein, and regular weight-bearing exercise matter as much or more. This is a real concern that requires proactive management, but many vegans successfully maintain good bone health with proper planning.
Evidence Summary
The primary evidence comes from the EPIC-Oxford study (Tong et al., 2020, BMC Medicine), the largest prospective study of fracture risk by diet group. Among 54,898 participants followed for a mean of 17.6 years, vegans had HR 1.43 (1.20-1.70) for total fractures and HR 2.31 (1.66-3.22) for hip fractures compared to meat-eaters. Adjustment for BMI, dietary calcium, and protein attenuated but did not eliminate the associations. The subgroup analysis at calcium intakes >=700mg/day still showed HR 1.50 (1.12-1.99) for vegans, indicating that calcium alone does not fully explain the elevated risk. Multiple mechanisms likely contribute: lower BMI reducing mechanical loading, potential inadequacies in vitamin D, B12, protein, and omega-3 fatty acids, and possibly other factors not yet fully characterized.
The EPIC-Oxford cohort is predominantly white British adults and may not generalize to all populations. Dietary intake was self-reported via food frequency questionnaires, which have known measurement error. The study could not distinguish between well-planned and poorly planned vegan diets. Supplement use was not fully characterized. Confounding by BMI is complex — lower BMI reduces fracture risk from cardiovascular causes but increases it from reduced mechanical loading and lower fat padding. The calcium >=700mg/day subgroup analysis had reduced statistical power due to smaller sample size. Additionally, this is a single large cohort study, not a meta-analysis of multiple populations.
Supporting Evidence
EPIC-Oxford (Tong et al. 2020, BMC Medicine) followed 54,898 people for 17.6 years on average. Vegans had hip fracture HR 2.31 (95% CI 1.66-3.22) — about 15 extra hip fractures per 1,000 people over 10 years. The excess was attenuated when calcium and protein intakes were adequate and BMI was not low.
The Bottom Line
Vegan bone health is a real concern supported by strong observational evidence. The data shows that calcium alone is necessary but not sufficient — a comprehensive approach addressing calcium, vitamin D, protein, B12, weight-bearing exercise, and overall dietary quality is required. Adequate calcium, vitamin D, and protein plus a healthy body weight and some weight-bearing exercise keep vegan bone health close to that of meat-eaters — routine, not a fraught project. The excess risk in EPIC-Oxford appears largely driven by vegans who were low in those specific factors, so the honest message is "cover the basics," not "plant-based eating weakens bones."
Practical Takeaways
Take a B12 supplement daily (a vegan multivitamin that also includes vitamin D is a convenient option), and get calcium and protein mainly from food. Consume calcium-rich foods: fortified plant milk, calcium-set tofu, kale, bok choy, fortified orange juice. Aim for at least 700mg total calcium daily from food and supplements combined. Get adequate protein from diverse sources — legumes, tofu, tempeh, seitan, nuts, seeds. Do weight-bearing exercise at least 3 times per week — resistance training, walking, jogging, or impact sports. Get vitamin D levels tested annually and supplement accordingly. Consider a DEXA scan baseline in your 40s-50s to monitor bone density. Do not rely on calcium alone — the EPIC-Oxford data shows this is insufficient.
Sources & Evidence
1 source cited across 1 claim
Vegan hip fracture risk mitigated by calcium, protein, BMI
Cohort Study