Introducing our premium blood tests: The Well Woman & The Well Man!

The Vitamin D Blood Test

Feeling a little sun-starved? Look no further. Now you can check your vitamin D levels with this quick finger prick test.

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Finger prick test kit provided
1 biomarker tested
Results in app within 48 hours
Doctor-reviewed report
Free delivery
18+ only

Is it for me?

Yes! You might want to test your vitamin D levels if:

You already supplement with vitamin D and want to monitor your levels.
You don’t go outdoors often.
You eat an unhealthy diet.
You have dark skin (for example, you have an African or South Asian background).
You live in the UK.
You wear clothes that cover up most of your skin.

What's tested?

Vitamins are essential micronutrients that your body needs to function normally. When you’re lacking in vitamins long-term, it can lead to various health problems, so getting the right amount you need is vital.
Helps your body absorb calcium and magnesium. Also important for keeping your bones, teeth and muscles healthy.

Meet our experts

Get to know our in-house clinicians

Dr Leah Gorodi

Medical Lead and GP with a special interest in lifestyle medicine and health prevention

doctor taran toor

Dr Taran Toor

Chief Medical Officer, clinical entrepreneur and GP with an interest in digital health

UKAS accredited

Get your results within 48 hours from UKAS-accredited labs.

Your privacy, guaranteed

Just like your doctor, we take your privacy extremely seriously.

Your data is secure. We use the latest encryption technologies and we’re committed to our data protection responsibilities.

Your data is never sold on, rented out, or shared with third parties for financial advantage.

We work with Care Quality Commission-accredited labs and our blood test kits are all CE-marked.



If your vitamin D levels are low, you may need more sun exposure, your body may not absorb vitamin D efficiently, or you may have kidney issues. High vitamin D levels can be a sign of over-supplementation from pills or diet or a result of certain medical conditions.

Symptoms of low vitamin D include:

  • tiredness
  • sleep difficulties
  • aches and pains
  • feeling generally unwell
  • getting sick more easily

You may also struggle with sharp pains and general weakness with more severe cases of vitamin D deficiency.

Vitamin D is made naturally in your skin through sunlight exposure. That’s why it’s best to check your levels during cooler seasons when you’re getting less sunshine than in summer. You could also be at risk of deficiency if you wear high-coverage clothing regularly. As many as 1 in 5 UK adults are deficient in vitamin D, so it’s a good health move to check your levels regularly.

No, you don't need to fast before this test.

Talk to your doctor before taking this test. Being pregnant can have a noticeable impact on your results, so make sure to check in with your GP first.