Nordic Pace Bone Health Nordic Pace BONE HEALTH

Bone health basics

How nutrients work together for bone strength

Bone is living tissue. It is rebuilt continuously, and that process depends on more than one nutrient arriving on schedule. This page explains the roles of calcium, vitamin D, protein and the minerals that rarely make headlines, using the figures UK public-health guidance actually publishes.

Read the calcium and vitamin D guide See everyday food sources
A dark kitchen working table in low morning light with eggs, a glass of milk and a knife

At a glance

Calcium
700mg
a day, most adults
Vitamin D
10µg
the daily supplement amount advised
Framework
Calcium, vitamin D, protein, plus magnesium, zinc and vitamin K
The structure

Bone is a working material, not a fixed frame

Calcium gives bone its strength and hardness, which is how NHS Highland puts it in its patient guidance. But bone also contains protein in a collagen framework, plus magnesium, zinc and vitamin K playing supporting roles. Remove any one of them and the structure is weaker than it looks.

This matters for how you read supplement marketing. A single-nutrient product can be useful, but bone is not built from one ingredient. The rest of this page shows where each piece fits.

A small dish of dark leafy greens with almonds scattered over a wooden board in soft daylight
Two numbers the guidance keeps returning to

Calcium and vitamin D carry the daily work

Calcium hardens bone and teeth. Vitamin D helps the body absorb calcium and is the one nutrient UK adults are actively advised to supplement. Together they run the everyday maintenance your skeleton depends on.

Calcium · most adults

700mg

a day. NHS Highland and NHS 111 Wales both publish this figure; NHS Inform uses it for adults over 50.

Vitamin D · adults, year-round

10µg

each day. NHS Somerset notes some groups may be advised to keep taking it through the year, not only in winter.

Calcium

Calcium's job and the UK number

Calcium is the mineral that hardens bone and teeth. UK guidance is unusually consistent here: NHS Highland and NHS 111 Wales both give 700mg a day for most adults, and NHS Inform uses 700mg for adults over 50.

Absorption is not unlimited. Your body takes what it needs and handles the rest, which is one reason very high single doses are not obviously better than spread-out intake from food.

Where the calcium number appears

NHS Highland · NHS 111 Wales · NHS Inform — 700mg a day for most healthy adults.

Vitamin D

Vitamin D as the gatekeeper

Vitamin D helps the body absorb calcium, and that phrase appears in guidance from NHS 111 Wales and NHS Inform alike. It also helps regulate calcium and phosphate, supports healthy bones, teeth and muscles, and is the nutrient most UK adults are actively advised to supplement.

The UK adult daily amount is 10 micrograms. NHS Somerset notes that some groups may be advised to take that amount throughout the year rather than just in winter.

Read the calcium and vitamin D guide
A single boiled egg on a small plate lit from the side on a dark wooden surface

Protein builds the framework calcium fills. Eggs, fish, dairy, beans and lentils all carry it.

The framework nutrient

Protein: the framework people forget

Collagen gives bone its flexibility, and collagen is protein. That makes protein intake relevant to bone health, not just to muscle. It also matters more with age, because appetite tends to fall while requirements do not.

You do not need a protein powder to cover this. Eggs, fish, dairy, beans, lentils and meat all contribute, and most UK adults can reach a reasonable intake by putting a protein source in each main meal. If appetite is poor, that is a conversation for a GP or dietitian.

Everyday protein sources

Eggs · oily fish · dairy · beans and lentils · meat

Supporting cast

Magnesium, zinc and vitamin K in plain terms

These three appear in bone-health discussions because they are involved in how bone tissue is formed and maintained. They are not the headline nutrients, and UK guidance does not set the same kind of widely publicised daily target for bone purposes that it sets for calcium and vitamin D.

Food covers them well. Leafy greens, nuts, seeds, wholegrains and pulses are ordinary sources. If you eat a varied diet, you are likely covering them without thinking about it.

Fortified and quiet

Fortified foods and why they matter in the UK

Fortified foods do a lot of quiet work in the UK diet. Most fa spreads are fortified with vitamin D, according to the NHS food-source list, which means a slice of toast can contribute. Breakfast cereals and plant-based drinks are often fortified with calcium and vitamin D as well.

If you avoid dairy, these products may carry most of your calcium. That makes label reading more important than it is for someone drinking milk daily, and the food sources guide covers what to look for.

A slice of toast with fa spread and a mug of plant-based drink on a wooden kitchen table in soft daylight
Two routes to the same nutrients

Where food and supplements divide

Food gives you nutrients in combinations and in amounts the body handles comfortably. Supplements give you a controlled dose of something specific, which is useful when a specific gap exists. The two routes are not interchangeable in every case, which is why the guidance treats them differently.

Food first

Calcium, protein, magnesium, zinc and vitamin K are broadly covered by an everyday mixed diet. Food supplies them together, in doses the body handles at its own pace, and alongside the other things meals already give you.

Supplements as a targeted top-up

Vitamin D is the clearest case. Few foods contain meaningful amounts, sunlight is seasonal in the UK, and the daily target is small enough that 10 micrograms is easy to deliver in a tablet. Calcium is the opposite: food covers it well, and supplementation usually follows clinical advice.

Check the supplement page
Across adult life

What changes across adult life

In your twenties and thirties, diet quality is mostly about maintenance. From around 50, the calcium reference is unchanged at 700mg but the context shifts: vitamin D synthesis becomes less reliable, activity often drops, and bone density declines with age.

Stage of adult life
What shifts
Twenties and thirties
Diet quality is mostly about maintenance.
Around 50 and after
Calcium reference stays at 700mg; vitamin D synthesis becomes less reliable.
Appetite falls
Protein and mineral needs do not fall with it.
If a medicine affects bone
Ask a pharmacist or GP — a simple check clears the question.

None of that calls for panic buying. It calls for consistency, and for asking a pharmacist or GP if you take medicines that affect bone or calcium handling.

Common questions

Answers readers ask first

Three questions that come up again and again when people start reading about calcium and vitamin D.

Do calcium and vitamin D need to be taken together?

Vitamin D helps the body absorb calcium, so they work as a pair. In practice that usually means covering vitamin D deliberately and getting calcium from food.

Is 700mg of calcium a target or a minimum?

UK guidance presents 700mg as the amount most healthy adults need. It is a reference point rather than a line to exceed by a wide margin.

Can I get everything from food?

Calcium, protein and the supporting minerals, usually yes. Vitamin D is the exception in the UK, which is why 10 micrograms daily is so widely advised.

Reasonable expectations

Bone strength is built over decades and lost gradually. No capsule reverses that in a fortnight, and products implying otherwise are overselling. What diet and habits do is support the process reliably over the years when it matters. That is a less exciting message than the one some supplements carry, but it is the one the UK guidance supports.

Put the guidance to work

Start with the foods you already eat, add vitamin D deliberately

Two next steps: check what everyday foods already cover your calcium and protein, then read how the supplement context works if a specific gap remains.

See everyday food sources Check the supplement page
A plain unlabelled supplement bottle turned away from the camera beside a small dish with an egg yolk

Where to go next

This page covers the basics. The companion guides go deeper on each thread — the calcium and vitamin D figures, the everyday foods, and the supplement question.

Nordic Pace Bone Health · 48 Fenchurch Street, London EC3M 3LY · Monday to Friday, 9:00 AM – 6:00 PM · Contact

Calcium & Vitamin D Guide

The two key figures with the guidance behind them.

Food Sources for Strong Bones

Everyday foods that carry calcium, protein and the supporting minerals.

Choosing a Supplement

What a supplement treats differently from food, and when a gap is worth covering.

British guidance does not treat bone health as a race. It treats it as a set of small daily habits that hold up over decades. If you would like to ask a person instead of a page, our team answers questions during working hours by phone on +44 20 7972 4449 or by email at [email protected]. This page is general education, not medical advice; if you take medicines that affect bone or calcium handling, a pharmacist or GP is the right next step.