Address your risk of low vitamin D
Targeted vitamin D intake helps prevent deficiency that weakens bones and muscles.
The number, drawn
Why it matters
Vitamin D helps the body absorb calcium, and deficiency can cause bone and muscle problems. NHS advice is to consider 10 micrograms daily in the UK during autumn and winter, with year round advice for some risk groups. This is deficiency prevention, not a proven way for everyone to prevent cancer or heart disease.
How to do it
- Check your country's seasonal vitamin D advice.
- In the UK, consider a daily supplement during autumn and winter.
- If you have little outdoor exposure or other deficiency risks, ask whether year round intake is appropriate.
- Check labels so that multiple products do not unintentionally supply large doses.
A diagnosed deficiency, kidney disease or high calcium requires individual advice. Treatment doses may differ from prevention doses.
Do it
Pick the time you have. Anything beats nothing.
Start with the time you have
1 minute
Prepare your question: 'With my outdoor time, skin coverage and health conditions, should I review my vitamin D intake?'
5 minutes
Read your national vitamin D advice, or the NHS guide if you live in the UK; note whether seasonal or year round advice may apply.
15 minutes
Gather labels for all your supplements and list health conditions for a pharmacist review; ask about duplicate vitamin D and suitability before changing products.
A plan
Check the advice that fits you
- Stage 1: Review your country's guidance and any existing clinical instructions.
- Stage 2: Discuss uncertainty, deficiency risk or overlapping products with a pharmacist or clinician.
- Stage 3: Keep the agreed plan and revisit it when the season, diet or health circumstances change.
In real life
- Check your country's advice rather than assuming the UK season applies where you live.
- Bring all supplement labels to a pharmacist to spot overlapping vitamin D.
- If usually indoors or covered outdoors, ask whether year round advice applies to you.
Watch out for
- Common mistakeDo not stack multivitamins and vitamin D products without checking: review the combined contents with a pharmacist.
- Common mistakeDo not use a prevention amount to treat diagnosed deficiency: follow your clinician's treatment plan.
Trusted guides
In Germany
In Germany, the DGE reference value of 20 µg of vitamin D a day applies only when the body makes none itself. Supplements are advised only for a proven deficiency that diet and sunlight cannot fix, for example in people rarely outdoors, people with dark skin, or frail older people.
In the Netherlands, a 10 µg vitamin D supplement is advised for children 0 to 3, pregnant women, women 50 to 69, and people 4 to 69 with dark skin, who are rarely outdoors or who cover their face. Everyone 70 and over is advised 20 µg.
Voedingscentrum checked
Check usSources
- Evidence grade
- A Meta-analyses of randomised trials, or a major guideline consensus.
- Basis
- UK deficiency prevention guidance and NIH nutrient guidance; not a general chronic disease prevention claim
- The number
- Consider 10 micrograms of vitamin D daily in autumn and winter (NHS, 2020)
- Outcome
- vitamin D supplement amount to consider in UK autumn and winter
- Comparison
- NHS prevention guidance, not treatment of diagnosed deficiency
- Tier 1 guidelineVitamin DNHS, 2020
- Tier 1 guidelineVitamin D: Fact Sheet for ConsumersNIH Office of Dietary Supplements, 2022
- Tier 1 guidelinePregnancy vitamins and supplementsNHS, 2026
General health information, not a diagnosis or an individual treatment plan. Personalization changes the order of suggestions; it does not assess your medical risks. Follow the cautions and consult a qualified clinician when needed.