Definition

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 remodelled 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 the menopause it tips sharply for several years as oestrogen 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: Roughly half of fragility fractures happen in people whose bone density is not in the osteoporotic range. 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.

$Cross-section comparison of healthy trabecular bone and osteoporotic bone showing thinned and disconnected trabeculae, alongside the common fracture sites at the hip, spine and wrist$

🦬 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 programmes performing best⁶.

🧤 Why falls sit alongside diet

Almost every hip fracture involves a fall. 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, agreed with your clinician. Do not take large boluses because they are convenient.

Signs & Risk Factors

How Osteoporosis Presents

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 factor	What it means	Worth knowing
A fracture from a fall at standing height or less	A fragility fracture, which by itself can establish the diagnosis	The single strongest predictor of the next fracture, and frequently not followed up
Height loss, or a stooped upper back	Possible vertebral fractures, which often happen without any recognised event	Most vertebral fractures are never diagnosed at the time
Sudden mid-back pain in an older adult	May be a vertebral fracture	New severe back pain deserves assessment rather than being attributed to age
Early menopause, or premature ovarian insufficiency	A longer period of life without oestrogen's protective effect on bone	See menopause and premature ovarian insufficiency
Long-term oral corticosteroid use	One of the most important causes of secondary osteoporosis	Bone protection is often indicated alongside; a prescriber question, never a reason to stop the steroid
Coeliac disease or other malabsorption	Calcium and vitamin D absorbed poorly for years, sometimes silently	See coeliac disease; unexplained osteoporosis is a recognised reason to test for it
Overactive thyroid, or over-replacement of thyroid hormone	Accelerated bone turnover	See thyroid disorders; worth reviewing the dose with your prescriber
Low body weight, smoking, heavy alcohol use	Each independently associated with lower bone density and higher fracture risk	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.

Assessment

How Osteoporosis Is Assessed

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

Measure	What it tells you	What it misses
DXA bone density scan	Bone mineral density at hip and spine, and the diagnostic classification	Says nothing about bone quality or falls risk, and about half of fractures occur above the osteoporotic threshold
Fracture risk calculators	Estimated probability of fracture over the next ten years, combining density with clinical risk factors	Population tools; they do not know about your stairs, your eyesight or your sedating medication
25-OH vitamin D	Whether deficiency is present and needs correcting	A number, not an instruction to take a large dose; see the danger note above
Calcium, phosphate, alkaline phosphatase, kidney function	Screens for other bone and mineral disorders	Normal results do not exclude poor dietary intake
Coeliac serology	A treatable malabsorptive cause that can be silent for years	Must be done while still eating gluten; see coeliac disease
Thyroid function, and review of thyroid hormone dose	Over-replacement accelerates bone loss and is common	A prescriber conversation; see thyroid disorders
Medication review	Corticosteroids, some anticonvulsants and several other classes affect bone or falls risk	Requires someone to actually look; it is rarely volunteered
Falls and balance assessment	The other half of fracture risk, and the half most often ignored	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, in a premenopausal woman, or that is more severe than expected for age, should prompt a search for an underlying cause rather than straight treatment. Coeliac disease, thyroid over-replacement, corticosteroid use and vitamin D deficiency are among the treatable ones, and finding them changes the plan.

Treatment Comparison

Holistic vs. Conventional 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 programmes 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, tinned fish with bones, tofu set with calcium, leafy greens, fortified plant milks.
Vitamin D sufficiency, not vitamin D excess, corrected at a daily dose after testing. See the danger note above.
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, 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.

💊

Conventional / Medical Approach

Medicines that reduce fracture risk, with calcium and vitamin D adequacy assumed alongside

First-Line

Antiresorptive medication, which reduces the rate at which bone is broken down and has fracture-reduction evidence behind it

Higher Risk

Bone-forming agents, used for people at very high risk or who fracture despite treatment

After a Fracture

The highest-risk window for the next fracture, and the point at which treatment is most clearly indicated

Alongside Either

Calcium and vitamin D sufficiency, and a falls assessment, both of which the medication assumes

Conventional Approach

Prescription treatment where fracture risk warrants it, chosen by a clinician. This page names no specific drug, because selecting between them depends on kidney function, dental status and fracture history.
Treatment straight after a fragility fracture, the window in which benefit is greatest and follow-up is most often lost.
Correcting vitamin D deficiency before starting certain treatments, since low calcium can otherwise be unmasked.
Managing corticosteroid-related bone loss where long-term steroids are unavoidable.
Reviewing treatment duration, since some agents are given for a defined period and some must not be stopped abruptly without a plan.

⚠️ An honest result, included on purpose. In more than 25,000 generally healthy adults, vitamin D supplementation did not reduce fractures, in a population not selected for deficiency or low bone density⁵. Vitamin D is for correcting deficiency, not a fracture treatment for everybody. And the calcium picture is similarly unflattering: a systematic review found increasing calcium intake produced small, non-progressive rises in bone density unlikely to translate into meaningful fracture reduction¹. A nutrition charity that reports only the encouraging trials is not educating anyone.

Nutritional Strategy

Diet for Osteoporosis

Feed the bone and feed the muscle that keeps you off the floor. Those are two jobs, and diet does both.

💡 Protein has been rehabilitated. For decades higher protein was said to acidify the blood and leach calcium from bone. A systematic review and meta-analysis conducted for the National Osteoporosis Foundation found the opposite of harm: higher protein intake was not associated with worse bone outcomes, and was associated with modestly better lumbar spine bone density⁷. For older adults, who are also losing muscle, this matters twice over.

Nutrient	Why it matters here	Best food sources
Protein	Bone matrix is largely protein, and muscle strength determines whether you fall	Dairy, eggs, fish, poultry, legumes, tofu, nuts. Spread across meals rather than concentrated in one
Calcium	The mineral the matrix is filled with. Food sources come with protein and other nutrients that supplements do not	Dairy, tinned sardines and salmon with bones, calcium-set tofu, fortified plant milks, kale, bok choy
Vitamin D	Required for calcium absorption. Sufficiency is the goal, not high levels	Oily fish, egg yolk, fortified foods, sunlight. Test rather than assume
Vitamin K	Needed to carboxylate osteocalcin, a bone matrix protein. See the anticoagulant warning below	Leafy greens for K1; natto, some cheeses and fermented foods for K2
Magnesium	A structural component of bone and involved in vitamin D metabolism	Nuts, seeds, legumes, whole grains, leafy greens
Potassium and fruit and vegetables	Associated with better bone density in observational work, plausibly through the acid-base load of the diet	Vegetables and fruit generally; no supplement needed
Sodium, in excess	Raises urinary calcium loss	Most dietary sodium comes from processed food, not the salt cellar
Alcohol, in excess	Affects bone-forming cells and substantially raises falls risk	The falls effect alone is reason enough to moderate it

⚠️ Food first, for a specific reason. A meta-analysis of calcium supplements reported a modest increase in the risk of myocardial infarction, a finding that has been contested and is not settled². The same signal has not been found for calcium from food. Given that the fracture benefit of supplemental calcium is itself modest¹, food is the sensible default, with supplements reserved for people who genuinely cannot reach an adequate intake and who have discussed it with their clinician.

Supplement Protocol

Evidence-Based Supplements

This is a section where the honest answer includes a warning about taking too much, which is unusual.

🚨 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 destabilise 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.

Supplement	What it is actually for	Typical range	Timing	Notes & 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. 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.

🚨 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 supplement evidence here is on 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 has prevented more fractures than any capsule.

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 2 September 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.

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 favourably. ↩ ↩
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. ↩ ↩
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. ↩ ↩ ↩
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. ↩ ↩
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, non-vertebral or hip fractures. The population is the key to reading it: this is evidence against supplementing replete people, not against correcting deficiency. ↩ ↩
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 programmes 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. ↩ ↩
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. ↩ ↩ ↩
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. ↩
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. ↩
NIH National Center for Complementary and Integrative Health, nccih.nih.gov, and the Linus Pauling Institute Micronutrient Information Center, lpi.oregonstate.edu. ↩