Bluecrest crestVitamin D Home Test


Despite its name, vitamin D is not a vitamin rather it is a prohormone (precursor of a hormone) made in our skin, and a nutrient found in certain foods. Its key role is to help regulate the amount of phosphate and calcium in the body, which is needed to keep bones, teeth and muscles healthy. Additionally, there is some evidence that vitamin D is needed to support immune, brain, cardiovascular, and nervous system health, as well as normal lung function.

Many people in the UK are deficient in vitamin D but are unaware of this as it is not routinely measured. Vitamin D tests, also called a vitamin D (25-OH) tests, check the levels of vitamin D in the blood to see if they are adequate.

Individual Packages

Vitamin D Home Test

£49.00 Book now

*Full price based on purchasing tests individually. Discount applied for purchasing tests as a package. All our tests have been specially designed to be convenient and non-invasive. Once you’ve booked your appointment, full preparation instructions will be provided in your confirmation email or letter. You can continue to eat and drink normally before your appointment, and you’ll also remain fully clothed throughout.

Individual Packages

Vitamin D Home Test

£49.00 Book now

What is a vitamin D (25-OH) test?

The body gains vitamin D through sun exposure on the skin, vitamin D supplements, and certain foods such as eggs, oily fish and fortified cereals.

Vitamin D needs to go through a transformation process in the liver in order to convert into a form that the body can use. This new form is a chemical called 25-hydroxyvitamin D, also called calcidiol. Therefore assessing 25-hydroxyvitamin (25-OH) vitamin D is the most accurate way to see how much vitamin D your body has, as it is the amount that the body has available to use.

An at-home vitamin D test is a simple finger prick blood test that will test whether your vitamin D levels are too low or too high. If your vitamin D levels are high, it can cause bone and kidney problems. Toxicity is rare and usually caused by taking too many supplements containing vitamin D.

What’s included in a vitamin D home test

Our home vitamin D test kits include:

  • A finger prick kit and vials for blood collection
  •  A clear set of instructions
  • A pre-paid, self-adhesive Royal mail tracked service label
  • Results from an accredited lab within 8 days
  • Access to your own MyWellness online account to view your detailed results
  • Access to a 24/7 GP Helpline for a year

How to buy a vitamin D blood test

Vitamin D tests are also included as part of our Total home test kits – which also offers 32 other key health readings – from immunity, bone and muscle health through to liver and kidney health risks. We provide great value with all our home test kits, with additional extras such as your own MyWellness results portal and 24/7 GP helpline access for a year being included with all our home test kits.

Did you know you could also get a vitamin D test as part of our more comprehensive Essential Energy & Fatigue Plus plan? It consists of an in-depth, face-to-face health check with a Health Assessment Specialists, which you can easily book online at one of over 2,000 mobile clinics available nationwide. You will receive a wide array of other key health markers and a detailed results report sent through the post.

Home Test Kits

Total Home Test Kit

£ 119

Track and improve your health from the comfort of your own home with the Total Home Test Kit package.

£129 when bought separately

33 Blood Readings - 24/7 GP Helpline

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Vitamins & Minerals

Essential Energy & Fatigue Plus

£ 269

Building on the Essential Energy & Fatigue package, this package also includes a full blood count, advanced vitamin checks, and an advanced thyroid function check to help assess the impact your lifestyle and diet is having on your energy levels.

£329 when bought separately

42 Blood Readings - 2 Clinician Checks - 24/7 GP Helpline

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Frequently Asked Questions

  • Why take a 25 hydroxy vitamin D blood test?

    A vitamin D (25-OH) test is a useful, non-invasive way to assess the vitamin D levels in the body. It can be highly beneficial to get tested because vitamin D deficiency is common and usually has no symptoms until complications such as osteoporosis develop.

    It is also particularly recommended to have a vitamin D test if any of the following apply to you:

    • 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 (for instance, you have dark skin or do not get a lot of sun exposure on your skin)
    • You have a high BMI
    • You have a diet low in animal products such as oily fish, red meat and dairy
  • What are normal vitamin D blood test levels?

    The “normal” range of vitamin D in the blood varies between laboratories. However, as a guide, a level below 25 nmol/L would be considered to diagnose Vitamin D deficiency.

  • What does a vitamin D deficiency mean?

    Vitamin D deficiency means you have lower than recommended vitamin D levels.

    Vitamin D’s role in promoting optimal calcium absorption is essential to maintain good musculoskeletal health in both adults and children. In fact, it protects children from various conditions including rickets, and adults from osteomalacia – which are both conditions causing soft, weak, and sometimes painful bones. Such disorders can lead to osteoporosis, which is the loss of bone density, and can in turn result in fractures.

    Research also suggests that vitamin D might be beneficial in the treatment or prevention of certain conditions, such as cardiovascular disease, cancer, infections and neurological conditions though this is more controversial.

  • How can you increase your vitamin D levels?

    Vitamin D levels can be increased by:

    • Eating vitamin D rich foods, including eggs, fortified cereals and oily fish
    • Taking daily supplements that include vitamin
    • Exposing your skin to sunlight but be careful not to get too much. You should ensure your skin does not burn or turn red.
Base Home Test Kit £59 Book now Extra Home Test Kit £89 Book now Total Home Test Kit £119 Book now
24/7 GP Helpline
Kidney Function
Bone Health, Energy & Muscles
Thyroid Function
Vitamin D (25-OH)
Blood Health