1,25-dihydroxyvitamin D (calcitriol)
This test measures 1,25-dihydroxyvitamin D, the biologically active form of vitamin D. It is used to investigate calcium imbalance, kidney disease and...
This test identifies your ABO and Rh blood type. It is essential for transfusions, pregnancy, and medical safety.
Turnaround time
1-2 days
Biomarkers count
1
Professional phlebotomist comes to you
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Visit our clinic for your test
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Home visits require at least 24 hours notice.
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SelectedThe Blood Group Test determines your ABO blood type (A, B, AB, or O) and Rhesus (Rh) factor (positive or negative). Knowing your blood group is essential for medical care, pregnancy planning, transfusions, and emergencies. Testing is performed in a UKAS-accredited laboratory, with fast results and an optional GP consultation.
What is a Blood Group Test?
A blood group test identifies specific antigens on the surface of red blood cells that define your blood type. The two most important systems are:
Together, these determine your full blood group (e.g., O-negative, A-positive). Blood group information is critical for:
At London Blood Tests, blood typing is carried out using validated laboratory methods in line with UK transfusion standards.
Benefits of the Blood Group Test
Why Do I Need a Blood Group Test?
You may need a blood group test if you:
Situations where blood group knowledge is essential:
Because blood group information is lifelong, testing provides permanent, valuable health knowledge.
How the Test Works
In-Clinic Testing at London Blood Tests
At-Home Blood Draw (Home or Hotel Phlebotomy – UK-Wide)
Your Blood Group Results – Explained
Results are reported as:
Examples:
Blood group results remain valid for life and can be used for future medical care.
Simple steps to get your results
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsFollow these guidelines for accurate results
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.
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