Aching bones and joints?
It’s rarely just
“take more calcium”.
Bone and joint pain with no injury to explain it is common — stiff knees on the stairs, a sore lower back, hips that ache after sitting. The usual advice is “take calcium”. But your body needs a small team of nutrients to use calcium well: vitamin D to absorb it, magnesium to switch vitamin D on, and vitamin K2 to send calcium into your bones. Here’s how that team works.
If the pain is in one joint, follows an injury, or comes with swelling, redness, warmth, fever or long morning stiffness, please see a doctor.
Bone and joint pain: why calcium alone isn’t the answer
Your bones need calcium, but calcium needs helpers. Vitamin D lets you absorb it, magnesium switches vitamin D on, and vitamin K2 guides calcium into your bones. A gap in any helper can matter even if you eat enough calcium.
Think of calcium as bricks for building your bones. Vitamin D is the gate that lets the bricks into your body. Magnesium is the key that unlocks the gate. And vitamin K2 is the builder who puts each brick in the right place — in your bones, not your blood vessels. Adding more bricks doesn’t help if the gate is locked or there’s no builder.
So the best approach is to get calcium from food — milk, curd, paneer, ragi, sesame and leafy greens. Then make sure the helpers are there too. Calcium tablets on their own are not the full answer.1
Vitamin D deficiency: the gate for calcium
Vitamin D helps your gut absorb calcium from food. Studies across India find 70–100% of people are low in it, even with plenty of sunshine. Very low vitamin D can cause aching bones and muscles.
Your body needs vitamin D to absorb calcium from food. Without it, much of the calcium you eat passes straight through. And in India, low vitamin D is extremely common — studies find 70–100% of people are low, despite all the sunshine.2 Indoor jobs, pollution, covered clothing and darker skin (which needs more sun to make vitamin D) all play a part.
When vitamin D is very low for a long time, bones can soften, causing aching bones and muscles, especially in the back, hips and legs.3 A simple blood test called 25(OH)D shows your level.
Magnesium and vitamin D: the key that switches it on
Your body must change vitamin D into its active form before it can use it, and every step needs magnesium. In a trial, magnesium helped bring vitamin D levels into the healthy range. Around 60% of your magnesium lives in your bones.
The vitamin D from sunlight or a tablet isn’t ready to use. Your liver and then your kidneys change it into the active form — and every one of those steps needs magnesium.4 Without enough magnesium, vitamin D can’t do its job properly.
A trial at Vanderbilt University tested this. Magnesium raised vitamin D in people whose levels were on the low side, and helped keep it in the healthy range for others. The researchers concluded that good magnesium status is important for good vitamin D status.5 In a large US survey, people taking vitamin D had higher levels when they also ate plenty of magnesium.5
Magnesium also matters for bones directly: about 60% of the magnesium in your body is stored in your bones, where it helps build strong bone crystals.6
“Vitamin D gets calcium in. Magnesium switches vitamin D on. K2 puts calcium where it belongs.”
The bone team, in one line
Vitamin K2 benefits: sending calcium to your bones
Vitamin K2 switches on osteocalcin, the protein that locks calcium into bone, and MGP, which keeps calcium out of artery walls. In a 3-year trial, MK-7 vitamin K2 (MenaQ7®) slowed bone loss and kept arteries more flexible in women after menopause.
Your bones make a protein called osteocalcin that grabs calcium and locks it into bone. But osteocalcin only works once vitamin K2 switches it on. K2 also switches on another protein, MGP, that stops calcium from building up in your artery walls. That’s where the idea “K2 sends calcium to bones, not arteries” comes from.
The best evidence comes from Maastricht University. Women after menopause took MK-7 vitamin K2 (MenaQ7®) or a dummy pill for three years. The K2 group lost significantly less bone in the spine and hip, and their bones stayed stronger.7 In the same women, K2 also kept arteries more flexible.8 A newer one-year trial found the same benefit for arteries.9
We use MK-7, the longest-lasting form of K2 in the body, studied by independent university teams.
Joint pain: boron, copper and zinc
Bones are mostly minerals; joints are mostly collagen. Copper helps build strong collagen. Boron helps your body hold on to calcium and magnesium — in one study, 3 mg a day cut calcium lost in urine by 44%.
Bones and joints are built differently. Bones are mostly minerals, but your joints, cartilage and ligaments are mostly collagen, a stretchy protein. Copper powers the enzyme that ties collagen fibres together so they stay strong.10 Zinc helps too — which is why we pair zinc with copper at a balanced 10:1 ratio.
Boron is a trace mineral that helps your body keep the calcium and magnesium it already has. In a study of women after menopause, 3 mg of boron a day cut the calcium lost in urine by 44% and also reduced magnesium loss.11
Other causes of aching bones and joints
Many aches come from everyday life: a new gym routine, more walking, poor posture, long hours sitting, or normal wear with age. Good nutrition works alongside these fixes.
Everyday causes
- A new workout, more walking, or new shoes
- Long hours sitting or poor posture
- Extra body weight on knees and hips
- Normal wear and tear with age
Where nutrition helps
- Low vitamin D — very common in India
- Low magnesium, needed to use vitamin D
- Enough K2 to guide calcium into bone
- Copper and zinc for strong collagen
The pain is in one joint, follows an injury, or comes with swelling, redness, warmth, fever or morning stiffness lasting more than 30 minutes. These can be signs of arthritis or another condition that needs proper diagnosis.
The whole bone team, not just calcium.
Two products that cover every helper on this page, in forms your body can use.
Bioactive Multivitamin
Vegan vitamin D3 (Vitashine®) at 600 IU — India’s recommended daily amount — and MK-7 vitamin K2 (MenaQ7®) at 55 µg, matching India’s recommended vitamin K intake. Vitamin D contributes to the maintenance of normal bones; vitamin K contributes to the maintenance of normal bones.
See the multivitamin →Element 5
300 mg of magnesium to switch vitamin D on, 3 mg of boron — the dose used in the calcium study above — and zinc with copper for collagen. Magnesium contributes to the maintenance of normal bones.
See Element 5 →What to do about aching bones and joints
See a doctor for warning signs. Get a vitamin D blood test. Eat calcium-rich foods, and make sure you’re getting enough vitamin D, magnesium and K2. Stay active and stretch.
- See a doctor for warning signsOne painful joint, swelling, warmth, fever, an injury, or long morning stiffness needs a proper check.
- Test your vitamin DA 25(OH)D blood test shows your real level — the only way to know.
- Eat calcium-rich foodsMilk, curd, paneer, ragi, sesame and leafy greens give your bones their building blocks.
- Cover the helpersMake sure you get enough vitamin D, magnesium and vitamin K2 so your body can use that calcium.
- Keep movingWalking and strength exercise tell your bones to stay strong. Stretch after sitting for long.
- The Maastricht K2 trials used 180 µg of MK-7 a day in women after menopause — about three times the amount in a daily multivitamin.7,8 Another trial using 375 µg of MK-7 improved K2 status but did not change bone density over three years.12
- A 2022 review of 16 K2 trials in women after menopause found better spine bone density. Many of those trials used a different form, MK-4, at 45 mg a day — a prescription dose used in Japan.13
- Some older MK-4 fracture trials were retracted after the researcher behind them was found to have made up data. Those trials did not involve MK-7.14
- The magnesium trial gave magnesium alone (no vitamin D). It raised vitamin D in people starting around 30 ng/mL. In people already above that, it lowered levels slightly — helping keep them in a healthy range.5
- The boron study was a small, closely monitored study in women after menopause.11
- In people whose vitamin D was already normal, vitamin D supplements have not been shown to reduce general aches or fractures.15,16
Bone and joint aches, answered simply.
Can vitamin D deficiency cause bone and joint pain?
Why does vitamin D need magnesium?
What does vitamin K2 do for bones?
Should vitamin D3 and K2 be taken together?
What is the difference between MK-7 and MK-4?
Will taking more calcium fix bone pain?
What helps joint pain nutritionally?
What does boron do for bones?
When should I see a doctor about joint pain?
Is it safe to take vitamin D, K2 and magnesium together?
Studies behind this guide
- Bolland MJ, Avenell A, Baron JA, et al. Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis. BMJ. 2010;341:c3691.
- Ritu G, Gupta A. Vitamin D deficiency in India: prevalence, causalities and interventions. Nutrients. 2014;6(2):729–75. PMID 24566435
- NIH Office of Dietary Supplements. Vitamin D — Fact Sheet for Health Professionals (deficiency, osteomalacia).
- Uwitonze AM, Razzaque MS. Role of magnesium in vitamin D activation and function. J Am Osteopath Assoc. 2018;118(3):181–9.
- Dai Q, Zhu X, Manson JE, et al. Magnesium status and supplementation influence vitamin D status and metabolism: results from a randomized trial. Am J Clin Nutr. 2018;108(6):1249–58. PMID 30541089 — n=180, magnesium vs placebo.
- NIH Office of Dietary Supplements. Magnesium — Fact Sheet for Health Professionals (50–60% of body magnesium in bone).
- Knapen MHJ, Drummen NE, Smit E, Vermeer C, Theuwissen E. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporos Int. 2013;24(9):2499–507. DOI 10.1007/s00198-013-2325-6 — n=244, 180 µg MK-7 (MenaQ7®).
- Knapen MH, Braam LA, Drummen NE, et al. Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal women: a double-blind randomised clinical trial. Thromb Haemost. 2015;113(5):1135–44. DOI 10.1160/TH14-08-0675
- Effects of one-year menaquinone-7 supplementation on vascular stiffness and blood pressure in post-menopausal women. Nutrients. 2025;17(5):815. DOI 10.3390/nu17050815 — n=165, 180 µg MK-7.
- Rucker RB, Kosonen T, Clegg MS, et al. Copper, lysyl oxidase, and extracellular matrix protein cross-linking. Am J Clin Nutr. 1998;67(5 Suppl):996S–1002S.
- Nielsen FH, Hunt CD, Mullen LM, Hunt JR. Effect of dietary boron on mineral, estrogen, and testosterone metabolism in postmenopausal women. FASEB J. 1987;1(5):394–7; reviewed in Nielsen FH. Update on human health effects of boron. J Trace Elem Med Biol. 2014;28:383–7.
- Rønn SH, Harsløf T, Pedersen SB, Langdahl BL. Vitamin K2 (menaquinone-7) prevents age-related deterioration of trabecular bone microarchitecture at the tibia in postmenopausal women. Eur J Endocrinol. 2016;175(6):541–9 — 375 µg MK-7, 3 years.
- Ma ML, Ma ZJ, He YL, et al. Efficacy of vitamin K2 in the prevention and treatment of postmenopausal osteoporosis: a systematic review and meta-analysis of randomized controlled trials. Front Public Health. 2022;10:979649. PMID 36033779 — 16 RCTs, n=6,425.
- Bolland MJ, Avenell A, Gamble GD, Grey A. Systematic review and statistical analysis of the integrity of 33 randomized controlled trials. Neurology. 2016;87(23):2391–402.
- Straube S, Derry S, Straube C, Moore RA. Vitamin D for the treatment of chronic painful conditions in adults. Cochrane Database Syst Rev. 2015;(5):CD007771.
- LeBoff MS, Chou SH, Ratliff KA, et al. Supplemental vitamin D and incident fractures in midlife and older adults (VITAL). N Engl J Med. 2022;387(4):299–309.