Blood test
Vitamin D
How much vitamin D your body has — the vitamin that helps you absorb calcium and keep bones and muscles strong.
What it is for
- Vitamin D
Why people check it
Most of our vitamin D is made in the skin with sunlight. In the UK, levels often drop over winter: up to a quarter of people are low by the end of it. Low vitamin D can weaken bones and muscles, and the immune system too.
- Vitamin D
Who it is for
Anyone living in the UK, especially at the end of winter, and people with a condition that affects how fat is absorbed, such as Crohn's disease.
- Signs
People often check it when they notice
- Tiredness
- Bone or muscle aches
- Low mood
- Getting ill more often
How to give your sample
The app shows which ways are open for this test before you pay.
A kit at home
A finger-prick kit by post, with the return postage paid. The app walks you through it.
A collection point
A blood sample taken at a collection point near you, found from your postcode in the app.
Someone comes to you
A professional takes the sample at your home or office, on the day you choose.
The result arrives in the app.
It is yours — keep it, or send it to the doctor of your choice: only a doctor can say what it means for you. This page explains what the test is for; it does not replace a consultation.
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