Quick answer: Bone is living tissue that constantly remodels. Calcium and vitamin D matter, but strong bones also depend on vitamin K2, magnesium, protein, collagen, trace minerals, healthy hormones and, most of all, weight-bearing and resistance exercise. Building and protecting bone is possible at any age.
Key takeaways
Bone is living tissue that remodels constantly, so it responds to how you eat and move at any age.
Vitamin K2, magnesium, protein, collagen and trace minerals matter alongside calcium and vitamin D.
Weight-bearing and resistance exercise send the strongest signal for bone, and healthy hormones help too.
Key nutrients beyond calcium and vitamin D
Vitamin K2 helps bind calcium into bone and is studied for slowing bone loss (see who should consider vitamin K2). With magnesium, much of the body’s supply is stored in bone, and it helps activate vitamin D. Protein and collagen peptides matter because collagen forms the flexible framework of bone.
Boron, zinc, copper, manganese and silica are cofactors for building bone, and omega-3s help calm inflammation that drives bone breakdown. Strontium has been studied for bone density, but it can distort DEXA readings and is not appropriate for everyone.
Food first: leafy greens, dairy or fortified alternatives, sardines with bones, beans, nuts and seeds. See also who should consider vitamin D3.
Habits that build bone
Weight-bearing and resistance exercise, one of the strongest signals for bone building, comes first, along with enough protein spread across the day and balance training to prevent falls. Limiting soda, excess alcohol and smoking helps too, as does safe sun exposure for vitamin D.
Bone and healthy aging
Bone is also an endocrine organ: it releases osteocalcin, a hormone involved in blood sugar and muscle function. With age, the stem cells that build new bone become less active and inflammation favors breakdown, which is why bone loss accelerates later in life. Strength training and good nutrition help counter that. Related: osteoporosis prevention and strength training for longevity.
Safety
According to the NIH Office of Dietary Supplements, adults need 1,000 to 1,200 mg of calcium a day from all sources, and more is not better: too much from supplements may raise the risk of kidney stones. If you have kidney disease, take blood thinners or have a history of kidney stones, talk with your provider before taking bone supplements.
When to see a naturopathic doctor
It may be time to see a naturopathic doctor if you have osteopenia or osteoporosis, or a family history, or if you are approaching or past menopause. The same is true if you have taken steroids, acid blockers or other medications that affect bone, or if you want a bone plan beyond calcium.
See a medical provider promptly for a fracture from a minor fall, sudden back pain with height loss, or new bone pain.
What the research shows
Heavy lifting can be safe and helpful for bone, even in women with low bone mass. In the LIFTMOR randomized trial published by Watson and colleagues in 2018, 101 postmenopausal women with osteopenia or osteoporosis, average age 65, did either 30 minutes of supervised high-intensity resistance and impact training twice a week or a gentle home program for 8 months. Lumbar spine bone density rose by 2.9% in the training group but fell by 1.2% in the home group, and femoral neck density, height and all physical function tests also favored training. Only one minor adverse event was reported. The program was closely supervised by trained staff, which matters for safety.
Calcium and vitamin D pills alone may not do as much as people think. A 2017 JAMA meta-analysis by Zhao and colleagues of 33 randomized trials with 51,145 community-dwelling adults over 50 found no significant link between calcium, vitamin D or both and a lower risk of hip, spine or total fractures. The results were similar regardless of dose, sex or baseline vitamin D level. This does not apply to people in nursing homes or with known deficiency or osteoporosis, who may need a different plan with their clinician.
Want a bone-strength plan that goes beyond calcium?
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Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Am I getting enough vitamin K2, magnesium and protein to support my bones?
Which nutrients besides calcium matter most for my bones?
Would checking my vitamin D or other labs help guide my bone support?
Which kinds of exercise would be safest and most helpful for my bones?
Frequently asked questions
Is calcium enough for strong bones?
No. Bone also needs vitamin D, vitamin K2, magnesium, protein, trace minerals and exercise.
What exercise is best for bones?
Weight-bearing exercise such as walking, and resistance training such as lifting weights, give bones one of the strongest signals to build.
Can you rebuild bone after 50?
Bone remodels throughout life. Exercise, nutrition and, when needed, medication can help maintain or improve bone density.
Should I take strontium?
It has been studied for bone density but affects DEXA scan readings and is not right for everyone. Discuss it with your provider.
Sources
- Watson SL, Weeks BK, Weis LJ, et al. High-Intensity Resistance and Impact Training Improves Bone Mineral Density and Physical Function in Postmenopausal Women With Osteopenia and Osteoporosis: The LIFTMOR Randomized Controlled Trial. J Bone Miner Res 2018. PMID: 28975661. https://pubmed.ncbi.nlm.nih.gov/28975661/
- Zhao JG, Zeng XT, Wang J, et al. Association Between Calcium or Vitamin D Supplementation and Fracture Incidence in Community-Dwelling Older Adults: A Systematic Review and Meta-analysis. JAMA 2017. PMID: 29279934. https://pubmed.ncbi.nlm.nih.gov/29279934/
- Knapen MH, et al. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporos Int 2013. PMID: 23525894. https://pubmed.ncbi.nlm.nih.gov/23525894/
- Uwitonze AM, Razzaque MS. Role of Magnesium in Vitamin D Activation and Function. J Am Osteopath Assoc 2018. PMID: 29480918. https://pubmed.ncbi.nlm.nih.gov/29480918/
- Lee NK, et al. Endocrine regulation of energy metabolism by the skeleton. Cell 2007. PMID: 17693256. https://pmc.ncbi.nlm.nih.gov/articles/PMC2013746/
- Jackson RD, et al. Calcium plus vitamin D supplementation and the risk of fractures. N Engl J Med 2006. PMID: 16481635. https://pubmed.ncbi.nlm.nih.gov/16481635/
- NIH Office of Dietary Supplements: Calcium (Consumer Fact Sheet)
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
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