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Postal service updates: October - December

Vitamin D (25 OH) Blood Test

Vitamin D (25 OH) Blood Test

£31.00 £39.00

A simple finger-prick blood test for vitamin D which is vital for strong bones, healthy immune function and mood.
Blood sample 1 biomarker included Results estimated in 2 working days from sample receipt at lab
Vitamin D (25 OH) Blood Test
Vitamin D (25 OH) Blood Test
Vitamin D (25 OH) Blood Test
Vitamin D (25 OH) Blood Test
Vitamin D (25 OH) Blood Test

Is it for you?

Vitamin D deficiency is common in the UK, but it is easy to investigate with this accurate laboratory finger-prick test. Keep an eye on your vitamin D levels or see whether low vitamin D could be contributing to symptoms like low energy and muscle aches and pains. So, whether you are unsure if you are getting enough vitamin D, spend little time in the sun, or have dark skin, which makes it harder to make vitamin D, this test can help.

What's included?

Biomarker profile

  • Vitamins

Vitamins (1 Biomarker)

Special instructions

Prepare for your Vitamin D (25 OH) Blood Test by following these instructions. You should take this test before you take any medication or vitamin/mineral supplements. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed.

From the expert

Vitamin D is a fat-soluble vitamin. It is also known as the sunshine vitamin because we produce most of what we need through exposure to the sun. Although vitamin D also comes from food, it is difficult to get all your requirements from food alone. Sources of vitamin D include oily fish, mushrooms, egg yolks and foods that have been fortified with vitamin D.

Vitamin D controls the absorption of calcium and phosphate by the body and is vital for keeping your bones and teeth healthy. That's why it is particularly important for pregnant women, breast-fed babies, and children under five to produce enough vitamin D. Vitamin D also plays an important role in immune function, mental health, and muscle function.

Symptoms of vitamin D deficiency can be vague. They include feeling low in energy, having more aches and pains than usual, depression, especially in winter, and constantly getting sick. Even if you don't have symptoms, it is worth testing your vitamin D as a high proportion of adults are deficient or have insufficient levels. If you're over 65, have dark skin or suffer from inflammatory bowel disease or other fat malabsorption conditions, you may be even more prone to vitamin D deficiency.

If your results are outside of the normal range, we'll let you know what steps you can take to improve your vitamin D levels.

Dr Sam Rodgers MBBS, MRCGP
Chief Medical Officer

Why take this test?

  • You spend a lot of time indoors and don't get much sun on your skin
  • You are in a higher-risk group for vitamin D deficiency e.g. you have dark skin
  • You feel like you're getting sick frequently
  • You have more aches and pains than usual

Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our UKAS accredited partner laboratories.

Dr Sam Rodgers - Chief Medical Officer

Expert advice with your results

Get trusted advice and comments from one of our doctors based on your results.

Your personal health centre

Your personal health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help
Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.