Blood Test: Vitamin D
Results in 2 working days
Analysed by NHS Lab
Personalised GP advice
Tracked 24 delivery
Quick finger prick test
Do you often feel tired or rundown? Have you been catching colds more often than usual? These could be signs of a vitamin D deficiency. Our vitamin D test kit will tell you if your levels are too low and could be causing symptoms such as low mood, fatigue or frequent illness.
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1 Biomarker
- What gets tested?
- What are biomarkers?
- Finger prick test
- Important Info
Vitamin D (25 OH)
Biomarkers are specific compounds we can detect in your blood sample that reflect different things about your health. Your test will tell you your levels for each of the above biomarkers, and whether they are in a normal range.
You can do this test at home without the need for a doctor. We'll send you everything you need to collect your sample and post it back to us. And it's all included in the cost.
Blood tests available through Rheia Health London are not intended to diagnose, treat, cure, or prevent any medical condition. Results should always be reviewed in consultation with your healthcare provider.
These tests are suitable for clients aged 18 and over. Certain tests may not be appropriate during pregnancy or for specific health conditions—please check suitability with your healthcare provider before purchasing.
Refunds for unused or incomplete tests are subject to our refund policy. By purchasing, you confirm you have read and agree to our terms. For full details, refer to the FAQ section or contact us.
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How our Vitamin D Blood Test works
Getting the insights you need to improve your health has never been easier.
Collect Your Sample
Easily collect a small blood sample from your fingertip using our simple kit. Once complete, send it back to our lab in the prepaid Tracked-24 envelope included.
Get Your Results
Your results are doctor-analysed and in-depth, delivered within 2 working days. Alongside the detailed report, you’ll receive actionable insights and optional expert commentary to help guide your next steps.
Take Action
Your personalised report highlights areas for improvement and tracks your progress. For additional support, book a session with our nutritionist to explore tailored nutritional solutions that fit your needs.
What is vitamin D & what does it do?
Vitamin D is a fat-soluble vitamin that we get from the sun and some foods. It’s responsible for controlling how your body absorbs calcium and phosphate, which are needed for energy, bone growth, and muscle and nerve function. The RDA for vitamin D in the UK is 10 micrograms (400UI) for everyone above the age of 1 (babies under 1 years old need between 8.5-10mg).
What are the symptoms of vitamin D deficiency?
Some symptoms related to low vitamin D levels include fatigue, depression, hair loss, muscle pain and bone pain. We found that 74% of people have vitamin D levels below the optimum range.
What will a vitamin D test tell me?
Checking your vitamin D levels may help you understand why you feel tired, but other tests, like our Nutricheck - Vitamin Deficiency Blood Test will give you much greater insight into your health, and can help uncover more than just a vitamin D test.
FAQ
How much vitamin D do I need a day?
The recommended daily intake of vitamin D in the UK is 10 micrograms (400UI) for both males and females above the age of 1. In adults, our doctors regularly recommend taking a Vitamin D supplement of 1000IU which is readily available in health food shops and pharmacies, as most of the people we test are very deficient! This is why we recommend tracking your Vitamin D levels.
What foods contain vitamin D?
Many foods in the UK are fortified with Vitamin D. The following foods are great sources of Vitamin D:
- oily fish
- red meat
- liver
- egg yolks
Do I need to take vitamin D supplements?
Whilst we get most of our Vitamin D from exposure to sunlight (Vitamin D is the only vitamin our bodies produce), the UK government understands that 1 in 6 adults have Vitamin D levels below government recommendations. It is important to check your Vitamin D levels using an at home blood test.
How long does it take to recover from vitamin D deficiency?
In the event that someone is deficient in Vitamin D, a doctor may prescribe a “loading dose”. Depending on the dose, it can take up to 10 weeks to resolve a deficiency.
Does vitamin D help with mental health?
Vitamin D is considered a vital factor in mental health such as low mood, depression, and quality of life.
What happens after I place my order for a blood test?
We have partnered with Forth to offer insightful, doctor-reviewed at-home blood tests, analysed in NHS-accredited labs. After purchase, your test kit will be sent to you within 3–5 working days. Each kit includes a 'Lab Request Form' with an activation link and unique code. Log on to the website to activate your account, where you can provide relevant information about your health.
Providing as much detail as you feel comfortable is highly recommended, as it enables specialist doctors to deliver personalised and comprehensive analysis. For example, sharing whether you are pregnant, breastfeeding, or managing specific health conditions allows the doctors to tailor their insights to your circumstances.
Once you collect your sample, we strongly encourage you to activate your account before sending your blood samples and ensure they are sent back to the lab as soon as possible and within 24 hours, especially for the Menopause Blood Test. This helps guarantee the most accurate results. You will be notified as soon as your results are ready by email or text.
How soon will the test arrive?
All our kits are sent out via Royal Mail first class post, so it should be with you within 3-5 working days.
How secure is my data?
We have strict processes in place to ensure the protection of your data. Following GDPR the company also operates under tight legal rules about the sharing of data which ensures that data is only shared if it is crucial to the delivery of our service. For example, our doctors see customer results at the time of review, however, after review, access to results is withdrawn.
Learn more about your data security.
Does a doctor review my results?
We have a team of doctors and nurses who look at all results and will comment on any results that are outside of the normal range for your age.
Important Information
The blood tests offered through Rheia Health London are provided by Forth, an independent third-party service. These tests are not intended to diagnose, treat, cure, or prevent any medical condition. Always consult a healthcare professional before making decisions based on your test results.
Rheia Health London facilitates access to blood tests provided by Forth. We do not process, analyse, or store any personal health information related to these tests. All sample collection, analysis, and results are handled solely by Forth, who operates under their own policies and procedures.
All personal data associated with these blood tests is managed exclusively by Forth in compliance with the General Data Protection Regulation (GDPR) and other applicable data protection laws. For more details, please refer to Forth’s privacy policy here.
Test results are reviewed by qualified medical professionals provided by Forth. These results should be interpreted in conjunction with advice from your healthcare provider. Rheia Health London does not provide medical advice, diagnoses, or treatment based on these results. Clients are responsible for consulting their healthcare provider for any medical decisions or follow-up care.
The results provided by Forth are based on the samples submitted and the testing methods used. Variations in results may occur due to factors such as sample quality, handling, or biological differences. For questions about the accuracy or interpretation of your results, please contact Forth.
Blood tests are available for clients aged 18 and over. Please ensure you meet the eligibility criteria before purchasing. Certain tests may not be suitable for individuals who are pregnant or have specific health conditions. Please consult with your healthcare provider before purchasing to ensure the test is suitable for your needs.
Sample collection kits are provided by Forth and must be returned promptly within the specified time frame to ensure accurate results. For questions about sample collection or kit delivery, please contact us or Forth directly.
These blood tests are not suitable for urgent or emergency medical situations. If you have immediate health concerns, please contact your healthcare provider or emergency services.
Rheia Health London accepts no liability for any adverse outcomes resulting from the use of blood tests provided by Forth or the interpretation of test results by clients. The responsibility for any health decisions made based on test results lies solely with the client in consultation with their healthcare provider.
Refunds for unused or incomplete tests are subject to Rheia Health London’s refund policy and may also depend on Forth’s terms and conditions. Please contact us for further assistance regarding refunds.
Blood testing services are currently available only in United Kingdom. Clients are responsible for ensuring the availability of services in their location before purchase.
Test results are typically provided within the stated number of days after the sample is received by Forth. Delays may occur due to unforeseen circumstances. Samples provided for testing are managed by Forth and are retained or disposed of in accordance with their internal policies. For further details, please contact Forth.
By purchasing a blood test through Rheia Health London, you acknowledge that you understand and agree to these terms. It is the client’s responsibility to ensure the suitability of the test for their needs and to consult a healthcare professional for further guidance.
Can I download the results to share with my GP?
Yes, you can download your results from your health dashboard as a PDF to share with your GP.
