Vitamin D Blood Test
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Overview
Check your vitamin D status with a focused Vitamin D Blood Test.
This clinic blood test measures 25-hydroxyvitamin D, also written as 25(OH) vitamin D, which is the main blood marker used to assess vitamin D status.
Your blood sample is collected at a clinic. No fasting is required, and your results include a doctor review.
At a Glance
- Sample: Blood
- Collection: Clinic appointment
- Results: Typically four working days after the laboratory receives a suitable sample
- Doctor review: Included
- Preparation: No fasting required
- Locations: Clinic locations across the UK and Ireland
Sample Needed
What Does This Test Check?
The Vitamin D Blood Test measures the level of 25-hydroxyvitamin D in your blood. You may also see this written as 25(OH) vitamin D or 25-OH vitamin D.
This is the main circulating form used to assess vitamin D status. Vitamin D helps the body regulate calcium and phosphate and is important for normal bone, teeth and muscle health.
A vitamin D result should be considered alongside your health history and other relevant clinical information. The test does not diagnose the cause of an abnormal level on its own.
What's Included?
25-Hydroxyvitamin D — 25(OH) Vitamin D
Measures your blood 25-hydroxyvitamin D level to provide information about your current vitamin D status. This marker is commonly used when assessing possible vitamin D deficiency and when clinically appropriate monitoring is required.
Why Choose This Test?
- Focused vitamin D measurement: Checks 25-hydroxyvitamin D without adding unrelated biomarkers.
- Clinic collection: Your blood sample is collected during a clinic appointment.
- No fasting: You do not need to fast before this test.
- Four-working-day results: Results are typically available within four working days after laboratory receipt of a suitable sample.
- Doctor-reviewed results: A doctor review is included to help put your result into context.
Who Is This Test For?
This vitamin D level test may be useful for people who want a focused measurement of their vitamin D status or who have been advised by a healthcare professional to check their vitamin D level.
It may also be considered when vitamin D status is relevant to bone or musculoskeletal assessment, or when vitamin D treatment is being monitored under clinical guidance.
If you need a wider assessment of nutritional or bone-related markers, a broader blood test may be more appropriate than a single vitamin D test.
Preparation
- Fasting: No fasting is required.
- Prescribed medicines: Continue prescribed medicines as usual unless a healthcare professional has advised you otherwise.
Your Results
Your vitamin D blood test results are typically available within four working days. The time frame begins when the laboratory receives a suitable sample.
Turnaround times are estimates rather than guarantees. Laboratory quality checks or further testing can occasionally affect timing.
Doctor review is included. Your result is reviewed to provide clinical context and appropriate next-step guidance. A separate GP consultation is different from the included written review.
You can also learn more about understanding your health results.
Frequently Asked Questions
What is a vitamin D blood test?
A vitamin D blood test measures the amount of 25-hydroxyvitamin D in your blood. This marker is used to assess your vitamin D status.
What is vitamin D called on a blood test?
Vitamin D testing is commonly reported as 25-hydroxyvitamin D, 25(OH) vitamin D or 25-OH vitamin D.
Do I need to fast before a vitamin D blood test?
No. Fasting is not required for this AIS Health Check Vitamin D Blood Test.
How long do vitamin D blood test results take?
Results are typically available within four working days after the laboratory receives a suitable blood sample.
Are my vitamin D results reviewed by a doctor?
Yes. Doctor review is included with this test. This written review is separate from a full GP consultation.
How do I read my vitamin D blood test results?
Your report provides your measured vitamin D result with the relevant laboratory information and doctor-reviewed comments. Interpretation should take account of the laboratory range and your wider clinical circumstances.
Is this a vitamin D home test?
No. This Vitamin D Blood Test uses clinic-based blood collection rather than home sample collection.
Check Your Vitamin D Level
Book your Vitamin D Blood Test online for convenient clinic collection, no fasting and doctor-reviewed results.
- Purchase your test(s) online making sure to give the name and date of birth of the person(s) taking the test. These details are required by the lab to uniquely identify your sample.
- You will get a confirmation email from us.
- We will process your order within an hour; Mon-Fri 9am-5pm.
- Then, look out for the booking link email from our partner laboratory, Randox Health.
- Click on the link to book an appointment for your test.
- Attend to do your test.
- Results are emailed to you.
All laboratories need information regarding the client to uniquely identify their test sample.
Without these details, tests cannot be processed.
The minimum requirement is the full name, biological sex and date of birth.
You should enter these details securely at the top before you click 'Add to cart'.
We ask for your Biological Sex because NORMAL RANGES for some tests are different for men and women.
Important information about result times
Result turnaround times are estimates and are provided for guidance only.
The stated timeframe begins when the laboratory receives your suitable sample.
Results may become available earlier or later than estimated.
Delays may occur because of transport, laboratory workload, quality checks, or further testing.
If the indicative times for results are not met, then please notify us immediately on info@aishealthcheck.co.uk.
Please do not use this service for urgent medical assessment.
Seek urgent medical advice when symptoms require prompt investigation.