Osteoporosis

Bone that has lost enough density and structure to break under a force that should not break it. The diagnosis is made on a scan, but the thing that matters is a fracture, and the nutrition evidence here contains a genuine surprise: more vitamin D is not better, and given in the wrong way it did harm3.

Musculoskeletal & Pain Evidence-Based

Last updated:

What Is Osteoporosis?

A skeletal condition of reduced bone mass and deteriorated bone structure, which together raise the risk that a bone breaks. Formally it is diagnosed when bone density on a scan sits far enough below a young adult reference, or when a fragility fracture has already happened.

Bone is not inert scaffolding. It is remodeled continuously, broken down by one cell population and rebuilt by another, and the balance between the two shifts across a lifetime. Peak bone mass is reached in the twenties. After that the balance tips slowly, and around menopause it tips sharply for several years as estrogen falls, which is why the condition is so much more common in women.

The distinction that matters most for reading anything about osteoporosis: bone density is a measurement, and fracture is the outcome. An intervention can improve the measurement without preventing a single break. Several of the findings below are exactly that case, which is why this page keeps asking what happened to fractures rather than what happened to the scan.

💡 Key Insight: At least half of fragility fractures happen in people whose bone density is not in the osteoporotic range12. Density is one input among several, alongside falls, muscle strength, age and previous fracture, which is why preventing falls sits beside feeding bone in everything below.
The pelvis and both thigh bones cut open: on one side porous, fragile osteoporotic bone, on the other dense, well connected normal bone, with callouts on bone resorption and formation and panels on DXA T-scores and common fracture sites

🦬 Why protein is not the enemy

The old idea that dietary protein leaches calcium from bone did not survive testing. A systematic review for the National Osteoporosis Foundation found higher protein intake was not harmful to bone, and may modestly help at the lumbar spine7.

🏋️ Why load matters

Bone adapts to the forces put through it. A Cochrane review of exercise in postmenopausal women found a small but statistically significant effect on bone density, with combination programs performing best6.

🧤 Why falls sit alongside diet

Almost every hip fracture involves a fall13. Strength, balance, vision, footwear, home hazards and sedating medication are part of fracture prevention, and no amount of calcium substitutes for them.

🚨 The most important safety finding on this page, and it is counterintuitive. A single large annual dose of vitamin D given to older women increased falls and fractures rather than reducing them3, and a monthly high-dose regimen also increased falls4. More vitamin D is not better, and large intermittent doses are not a shortcut. Correct a measured deficiency, at a sensible daily dose set with your clinician. Do not take large boluses because they are convenient.

Osteoporosis by the Numbers

10.2 million
US adults aged 50 and over with osteoporosis in 2010, with another 43.4 million who had low bone mass14
55%
fewer clinical spine fractures in women at higher risk who took a first-line antiresorptive medicine for one to three years, compared with placebo15
-2.5 or lower
the bone density T-score that defines osteoporosis on a scan; between -1 and -2.5 is osteopenia16
6 to 12 months
how long the most common bone-strengthening tablets usually take to work; they may be needed for 5 years or longer17
1.26ร—
the fracture rate in 2,256 women aged 70 and over given one large vitamin D dose each year, compared with placebo; falls rose too3
25,871
generally healthy adults in a trial where daily vitamin D did not reduce total, nonvertebral or hip fractures; they were not selected for deficiency or low bone density5

Symptoms of Osteoporosis

It has no symptoms at all until a bone breaks, which is the whole problem. These are the things that identify risk before that happens.

Sign or risk factorWhat it means
A fracture from a fall at standing height or lessA fragility fracture, which by itself can establish the diagnosis. Worth knowing: The single strongest predictor of the next fracture, and frequently not followed up.
Height loss, or a stooped upper backPossible vertebral fractures, which often happen without any recognized event. Worth knowing: Most vertebral fractures are never diagnosed at the time.
Sudden mid-back pain in an older adultMay be a vertebral fracture. Worth knowing: New severe back pain deserves assessment rather than being attributed to age.
Early menopause, or primary ovarian insufficiencyA longer period of life without estrogen's protective effect on bone. Worth knowing: See menopause and premature ovarian insufficiency.
Long-term oral corticosteroid useOne of the most important causes of secondary osteoporosis. Worth knowing: Bone protection is often indicated alongside; a prescriber question, never a reason to stop the steroid.
Celiac disease or other malabsorptionCalcium and vitamin D absorbed poorly for years, sometimes silently. Worth knowing: See celiac disease; unexplained osteoporosis is a recognized reason to test for it.
Overactive thyroid, or over-replacement of thyroid hormoneAccelerated bone turnover. Worth knowing: See thyroid disorders; worth reviewing the dose with your prescriber.
Low body weight, smoking, heavy alcohol useEach independently associated with lower bone density and higher fracture risk. Worth knowing: All three are modifiable, and all three also raise falls risk.
⚠️ A fracture that is treated but not investigated is a missed diagnosis. Breaking a wrist, hip or vertebra after a minor fall is the clearest signal osteoporosis gives, and the period straight after a first fracture carries the highest risk of the next one. If you have had one, ask whether your bone health has been assessed, not just whether the bone has healed.

Causes of Osteoporosis

Losing some bone with age is normal; osteoporosis follows when bone is lost faster than usual, and these are the established reasons16.

CauseHow It Contributes to OsteoporosisWhat Helps
Age and menopauseBone loss is part of aging, and women lose bone rapidly in the first few years after menopause, especially if it starts before 45 or the ovaries have been removed16A fracture-risk assessment and, where risk is high, prescribed bone-strengthening medicine; after an early menopause, ask about hormone treatment17
Long-term steroid tabletsTaking high-dose steroid tablets for more than 3 months raises the risk16Bone protection prescribed alongside the steroid; never stop a steroid on your own
Malabsorption and hormone conditionsConditions that stop calcium and vitamin D from being absorbed, hormone-related and inflammatory conditions, and some long-term medicines that affect bone or hormones16The celiac, thyroid and medication checks in the diagnosis section, since treating the cause changes the plan
Low body weight and eating disordersA low body mass index, or having had anorexia or bulimia, raises the risk16Enough protein and energy, as the diet section describes, with specialist care for an eating disorder
Smoking, heavy drinking and inactivityEach raises the risk16; exercise has a small but real effect on bone density in postmenopausal women6Stopping smoking, moderating alcohol, and progressive resistance and weight-bearing exercise, as the treatment section describes
Family historyA family history of osteoporosis raises the risk, particularly a parent's hip fracture16Nothing to change; tell your clinician so it is weighed in the fracture-risk assessment the diagnosis section describes

How Osteoporosis Is Diagnosed

A scan gives a number. A proper assessment asks why the number is what it is, and what the actual fracture risk is.

TestWhat it shows
DXA bone density scanBone mineral density at hip and spine, and the diagnostic classification. Worth knowing: Says nothing about bone quality or falls risk, and at least half of fractures occur above the osteoporotic threshold12.
Fracture risk calculatorsEstimated probability of fracture over the next ten years, combining density with clinical risk factors. Worth knowing: Population tools; they do not know about your stairs, your eyesight or your sedating medication.
25-⁠OH-D (vitamin D blood test)Whether deficiency is present and needs correcting. Worth knowing: A number, not an instruction to take a large dose; a large single yearly dose of vitamin D increased falls and fractures in a trial3.
Calcium, phosphate, alkaline phosphatase, kidney functionScreens for other bone and mineral disorders. Worth knowing: Normal results do not exclude poor dietary intake.
Celiac serologyA treatable malabsorptive cause that can be silent for years. Worth knowing: Must be done while still eating gluten; see celiac disease.
Thyroid function, and review of thyroid hormone doseOver-replacement accelerates bone loss and is common. Worth knowing: A prescriber conversation; see thyroid disorders.
Medication reviewCorticosteroids, some anticonvulsants and several other classes affect bone or falls risk. Worth knowing: Requires someone to actually look; it is rarely volunteered.
Falls and balance assessmentThe other half of fracture risk, and the half most often ignored. Worth knowing: Not part of a DXA report, so it has to be asked for.
💡 Ask for the secondary causes to be excluded. Osteoporosis in a man or a premenopausal woman, or osteoporosis more severe than expected for age, should prompt a search for an underlying cause rather than straight treatment. Celiac disease, thyroid over-replacement, corticosteroid use and vitamin D deficiency are among the treatable ones, and finding them changes the plan.

Conventional and Holistic Treatment for Osteoporosis

🌿 HOLISTIC
💊 CONVENTIONAL
🌿

Holistic / Functional Approach

Protein, calcium from food, adequate vitamin D, loading the skeleton and not falling over

Protein
Not harmful to bone (contrary to the old acid-ash theory) and possibly modestly protective at the lumbar spine7
Exercise
A small but significant effect on bone density in postmenopausal women, with combination programs best6
Timeline
Muscle strength and balance improve in weeks; bone density changes over years, if at all
Limitation, stated plainly
No dietary measure has been shown to prevent fractures the way medication does in established osteoporosis

Full Holistic Approach Includes

  • Adequate protein at each meal, which supports both bone matrix and the muscle that keeps you upright.
  • Calcium from food first: dairy, leafy greens, canned sardines and wild salmon with bones.
  • Vitamin D sufficiency, not vitamin D excess, corrected at a daily dose after testing. A large single yearly dose of vitamin D increased falls and fractures in a trial3.
  • Resistance training plus weight-bearing impact, progressively loaded, which is the stimulus bone responds to.
  • Balance work, since the fall is usually the proximate cause of the fracture.
  • Removing the falls hazards: loose rugs, poor lighting, unchecked eyesight and sedating medication (reviewed with the prescriber).
  • Stopping tobacco and moderating alcohol, both of which affect bone and balance.
🌿 Worth knowing: this approach builds the foundation and reduces falls. In established osteoporosis, particularly after a fracture, it is not a substitute for medication that has been shown to prevent further fractures.

Evidence-Based Supplements for Osteoporosis

Taking too much of some of these does harm, so read the cautions.

🚨 If you take warfarin or another vitamin K antagonist, do not start a vitamin K2 supplement without telling the clinician who manages your anticoagulation. These medicines work by blocking vitamin K, so supplemental vitamin K directly opposes them and can destabilize your INR9. The issue is consistency as much as quantity: a sudden change in vitamin K intake in either direction is what causes trouble. This does not apply in the same way to the direct oral anticoagulants, which do not work through vitamin K, but tell your prescriber regardless.
SupplementWhat it is forTypical rangeTimingNotes & cautions
Vitamin D3 Correcting a measured deficiency so that calcium is absorbed properly. Not a fracture treatment in people who are already replete. Test 25-⁠OH-D first and set a daily dose with your clinician Daily, with a fat-containing meal Do not take large intermittent doses. An annual high dose increased falls and fractures3 and a monthly high-dose regimen increased falls4. In generally healthy adults supplementation did not reduce fractures at all5. The adult upper intake level is 4,000 IU a day; a dose above it is for your clinician to set when correcting a deficiency. Retest at 3 months.
Calcium Filling a genuine dietary shortfall only, where food cannot realistically reach an adequate intake. Enough to top up food intake, not a fixed large dose. Divide doses; absorption falls above roughly 500 mg at once With food, split through the day Food first, for the cardiovascular question above2. Can cause constipation and bloating. Reduces absorption of thyroid hormone, some antibiotics and iron, so separate them by several hours. Discuss with your clinician if you have had kidney stones or have kidney disease; see chronic kidney disease.
Vitamin K2 (MK-⁠7) Carboxylating osteocalcin. Three years of low-dose MK-⁠7 reduced the loss of bone mineral density in healthy postmenopausal women8. 100 to 200 mcg per day; the trial above used 180 mcg With a fat-containing meal See the anticoagulant warning above; this is the important one. The trial measured bone density and bone strength rather than fractures, so treat it as promising and not as proven fracture prevention.
Magnesium Correcting a shortfall where dietary intake is low. A structural component of bone and involved in vitamin D metabolism. 200 to 400 mg per day of elemental magnesium if food intake is low Evening, with food Citrate and glycinate are better tolerated than oxide. Can loosen stools. Reduce or avoid in reduced kidney function, where magnesium accumulates. The top of this range is above the 350 mg/day upper intake level for supplemental magnesium11; above that, diarrhea is common. With kidney disease, take it only on your clinician's advice.
🚨 What to avoid, specifically. Large intermittent vitamin D doses, for the reasons above. Vitamin A in high doses from retinol supplements or high-dose cod liver oil, which is associated with reduced bone density and higher hip fracture risk in observational studies; beta-carotene from food does not carry the same concern. Strontium products sold online, which interfere with the DXA reading itself so that bone looks denser than it is. Any product promising to rebuild bone, since none of the supplements here has been shown to prevent fractures. And do not stop a prescribed bone medicine to try any of this.
💡 Where the real leverage is. Protein at every meal, calcium from food, vitamin D corrected to sufficiency and no further, progressive resistance training, balance practice and removing the things in your home that trip people up. The last of those is easy to overlook, and most fractures start with a fall.

What to Expect Over Time

Bone changes slowly, and the outcome that counts is fewer fractures; for people at high risk, prescribed medicine does most of that.

Treatment and supportive care, together
First Weeks

After a break from a minor fall, ask for your bone health to be assessed as well as the break treated; a risk calculator and a bone density scan guide what comes next. Removing trip hazards and checking eyesight start now16.

Months 1 to 3

If fracture risk is high, a clinician prescribes a bone-strengthening medicine, and calcium and vitamin D are brought up to adequate levels alongside it, not instead of it17. Resistance and balance training starts6.

Months 3 to 12

The most common tablets usually take 6 to 12 months to work17. In women at higher risk they cut clinical spine fractures by more than half15; scan results change slowly.

Long Term

Treatment often lasts 5 years or longer, and the need to continue is reviewed periodically1718. Protein, calcium from food, enough vitamin D and exercise keep supporting it.

When to Seek Care

See a doctor after a break from a minor fall, or for sudden severe back pain, loss of height or a stooped posture, which can mean a spine fracture19. On a bone-strengthening medicine, report any thigh, hip or groin pain18, and mention any jaw problems, since a rare jaw bone side effect is linked to these medicines17.

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Fewer Fractures Is What Counts

Bone changes slowly, and the outcome that counts is fewer fractures; for people at high risk, prescribed medicine does most of that. Alongside it, start resistance and balance training, remove trip hazards and have your eyesight checked.

References & Evidence Notes

Each numbered entry below is either a source you can follow or a note setting out what the evidence does and does not support. Both are numbered together so the markers in the text line up.

Last reviewed October 20, 2026. Supplement entries are cross-checked against the NIH National Center for Complementary and Integrative Health and the Linus Pauling Institute Micronutrient Information Center.10 This page is nutrition education, not medical advice, and it does not replace your doctor. Nutrition does not treat established osteoporosis on its own. No dietary measure here has been shown to prevent fractures the way prescribed treatment does, and nothing on this page is a reason to decline or stop it. What nutrition education can do is help you understand the evidence well enough to have a better conversation with the clinician who does treat you.

  1. Tai V, Bolland MJ, et al. Calcium intake and bone mineral density, and calcium intake and risk of fracture: systematic review. BMJ. 2015;351:h4183 and h4580. PubMed 26420387. Increasing calcium intake from diet or supplements produced small, non-progressive increases in bone density, which the authors judged unlikely to translate into clinically meaningful fracture reduction. This conclusion is not universally accepted, and other groups read the same literature more favorably. ↩ ↩
  2. Bolland MJ, et al. Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis. BMJ. 2010;341:c3691. PubMed 20671013. Reported a modest increase in myocardial infarction with calcium supplements. This finding is contested, was not the primary endpoint of the trials pooled, and has not been replicated consistently. It is included because it is a real signal that has changed practice toward food sources, not because the question is settled. ↩ ↩
  3. Sanders KM, et al. Annual high-dose oral vitamin D and falls and fractures in older women: a randomized controlled trial. JAMA. 2010;303(18):1815-⁠1822. PubMed 20460620. A single large annual dose increased falls and fractures rather than reducing them, with the excess concentrated in the months after dosing. This is the clearest evidence that the route and frequency of vitamin D matter, not only the total amount. ↩ ↩ ↩
  4. Bischoff-Ferrari HA, et al. Monthly high-dose vitamin D treatment for the prevention of functional decline: a randomized clinical trial. JAMA Intern Med. 2016;176(2):175-⁠183. PubMed 26747333. Higher monthly doses achieved higher blood levels and were associated with a higher rate of falls, which is the same direction of harm as the annual-dose trial. ↩ ↩
  5. LeBoff MS, et al. Supplemental vitamin D and incident fractures in midlife and older adults (VITAL). N Engl J Med. 2022;387(4):299-⁠309. PubMed 35939577. More than 25,000 adults, not selected for vitamin D deficiency, osteoporosis or low bone mass; supplementation did not reduce total, nonvertebral or hip fractures. The population is the key to reading it: this is evidence against supplementing replete people, not against correcting deficiency. ↩ ↩
  6. Howe TE, et al. Exercise for preventing and treating osteoporosis in postmenopausal women. Cochrane Database Syst Rev. 2011;(7):CD000333. PubMed 21735380. A small but statistically significant effect on bone density, with combination exercise programs the most effective. Fracture data were too sparse for a firm conclusion, which is why this page frames exercise as building the foundation rather than as proven fracture prevention. ↩ ↩
  7. Shams-White MM, et al. Dietary protein and bone health: a systematic review and meta-analysis from the National Osteoporosis Foundation. Am J Clin Nutr. 2017;105(6):1528-⁠1543. PubMed 28404575. Higher protein intake was not detrimental to bone and was associated with modestly higher lumbar spine bone mineral density. This overturns the older acid-ash hypothesis that higher protein leaches calcium from the skeleton. ↩ ↩ ↩
  8. Knapen MHJ, et al. Three-year low-dose menaquinone-⁠7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporos Int. 2013;24(9):2499-⁠2507. PubMed 23525894. 180 mcg of MK-⁠7 daily reduced the age-related decline in bone mineral content and bone mineral density at the spine and femoral neck. The endpoints were density and bone strength indices, not fractures. ↩
  9. Interaction between dietary vitamin K intake and anticoagulation by vitamin K antagonists. Medicine (Baltimore). 2016;95(10):e2895. PubMed 26962786. Vitamin K antagonists act by blocking vitamin K, so intake affects anticoagulation and consistency of intake matters as much as amount. This does not apply in the same way to direct oral anticoagulants, which do not act through vitamin K. ↩
  10. National Center for Complementary and Integrative Health (NIH), nccih.nih.gov, and the Linus Pauling Institute Micronutrient Information Center, lpi.oregonstate.edu. ↩
  11. On magnesium: the US tolerable upper intake level for magnesium from supplements in adults is 350 mg a day, set with diarrhea as the limiting effect, PubMed 37487817. ↩
  12. On fractures above the osteoporosis threshold: in 8,065 women aged 65 and over followed for up to five years, 54% of the 243 who broke a hip did not have osteoporosis on a hip scan at the start, PubMed 15728213; and among 149,524 postmenopausal women measured with peripheral devices, 82% of those who had a fracture within a year had T-scores better than -2.5, PubMed 15159268. ↩
  13. On falls and hip fractures: in 206 consecutive patients with a new hip fracture, 98% of the fractures resulted from a fall, most often sideways onto the hip, PubMed 10441647. ↩
  14. On how common osteoporosis is: applying US national survey data from 2005 to 2010 to the 2010 census, an estimated 10.2 million adults aged 50 and over had osteoporosis (10.3%) and another 43.4 million had low bone mass, PubMed 24771492. ↩
  15. On what medicine does for fractures: a 2025 Cochrane review of a first-line bisphosphonate in postmenopausal women found that in 20 secondary prevention trials (7,375 women at higher risk, one to three years long) it probably reduced clinical spine fractures by more than half (risk ratio 0.45; 24 of 1,114 women against 51 of 1,055 on placebo), and may reduce nonvertebral, hip and wrist fractures, PubMed 39868546. ↩
  16. On causes and diagnosis: NHS guidance lists aging, the years after menopause (especially early menopause), high-dose steroid tablets for more than 3 months, inflammatory, hormone-related and malabsorption conditions, some long-term medicines, an eating disorder, a low body mass index, lack of exercise, heavy drinking, smoking and a family history, particularly a parent's hip fracture, among the causes, and describes diagnosis by a fracture-risk calculator and a bone density scan, with a T-score below -2.5 defined as osteoporosis, NHS, osteoporosis. ↩
  17. On treatment: NHS guidance states that anyone diagnosed after a broken bone should still be treated to reduce the risk of further breaks, that enough calcium and vitamin D is part of treatment, that bisphosphonates usually take 6 to 12 months to work and may be needed for 5 years or longer, that osteonecrosis of the jaw is a rare side effect so a dental checkup may be needed first, and that women with an early menopause are usually advised to take hormone treatment until at least 51, NHS, osteoporosis treatment. ↩
  18. On thigh pain during treatment: the UK medicines regulator advises that atypical thigh bone fractures occur rarely with long-term bisphosphonate treatment, can be preceded by thigh or groin pain for weeks to months, and that patients should report any thigh, hip or groin pain; it also advises that the need for continued treatment be re-evaluated periodically, MHRA Drug Safety Update. ↩
  19. On spine fractures: NIH guidance describes osteoporosis as having no symptoms until a bone breaks, lists severe back pain, loss of height and a stooped or hunched posture as symptoms of a spine fracture, and notes that fragile bones can break after a fall from standing height, NIAMS, osteoporosis. ↩