Vitamin D (25 OH) Blood Test

This at home test measures your vitamin D levels. This fat-soluble vitamin is essential for maintaining normal blood levels of calcium and phosphorus, the formation and maintenance of healthy bone and teeth, and also plays an important role in immune health.

Collection method:

Finger-prick sample

Number of biomarkers tested: 1


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More about this test

The major form of vitamin D found and measured in your blood is 25-hydroxyvitamin D. It is relatively inactive but is the precursor to the active hormone. Vitamin D is also known as the ‘sunshine vitamin’ as most of the vitamin that the body requires is produced through the skin’s exposure to the sun. Vitamin D also comes from the food however it can be difficult to get all that the body requires from just the diet.

• Blood collection device using finger-prick method
• Tracked 24 return mailing bag
• A doctor validated report
• 2 working days turnaround from sample receipt at lab

Order by 3pm weekdays and your test will be the dispatched the same day (excluding bank holidays). Royal Mail tracked 24 shipping is provided free of charge. You will be emailed your tracking number.

This test measures 25-OH vitamin D. Your results will show the level of vitamin D in your blood and whether this level is deficient, insufficient, normal or elevated.

You should take this test before you take any vitamin or mineral supplements. Do not take biotin supplements for 2 days prior to this test. If you are taking prescribed biotin you should discuss this with your doctor.

25-OH vitamin D

How it works

Choose your test

Take control of your health from our range of home-to-lab tests and we’ll send the kit straight to your door.

Post your sample

Simply collect your sample at home and return it to our network of fully accredited labs for expert analysis.

Get your results

Your results will be delivered via our secure online health hub within days.

Your results

Once your sample has been analysed by our laboratory experts, your results will be collated into a clear, easy to understand report.

We always recommend sharing your report with your doctor or healthcare provider as supplementary information to your overall healthcare. Our tests are not intended as a substitution for professional medical advice and you should speak to your doctor if you are seriously worried in any way about your symptoms.

view sample report