Advanced Vitamins Blood Test
£499 ✓ In Stock
Your sample goes to a UKAS accredited laboratory meeting ISO 15189 standards.
After you receive your order confirmation email, please reply with your date of birth.
How it works
Your testing journey
This test is performed at The Doctors Laboratory in Central London. Walk-in service available.
Purchase your test
Order online. You will receive confirmation with your test reference and everything you need to know about attending The Doctors Laboratory in London.
Walk in to TDL London
No appointment needed. Walk in during opening hours at 76 Wimpole Street, London W1G 9RT. Call 020 7025 7940 if you need to check before travelling.
Call TDL: 020 7025 7940
Venous blood draw
A trained phlebotomist at TDL takes a small venous blood sample from your arm. The whole process takes around 10 minutes.
£50 attendance fee payable at lab
Results in 3 working days
Your results are processed by the specialist laboratory and delivered securely to your email within 3 working days of your visit.
76 Wimpole Street
London W1G 9RT
Saturday: 7am–1pm
Bond Street (7 min walk)
Venous Blood Collection Kit
This kit is sent to you and taken to your chosen clinic. The phlebotomist will collect your sample using the materials provided.
- 1Vacutainer blood collection tubes
- 2Needle and butterfly needle
- 3Tourniquet
- 4Alcohol swab
- 5Cotton wool and gauze
- 6Adhesive plaster
- 7Biohazard specimen bag
- 8Prepaid return envelope (Royal Mail Tracked 24)
- 9Laboratory request form
- 10Instructions for the phlebotomist
Vitamin B1 is essential for converting carbohydrates into energy and plays a vital role in nerve, muscle, and heart function. It is found in whole grains, pork, legumes, and nuts.
Vitamin B2 is crucial for energy production, cellular function, and metabolism of fats and drugs. It is found in dairy products, eggs, lean meats, and green vegetables. Highly light-sensitive.
Vitamin B3 (niacin/nicotinamide) is essential for energy metabolism and DNA repair. It supports skin health, nervous system function, and digestive health. Good sources include meat, fish, peanuts, and fortified cereals.
Vitamin B6 is involved in over 100 enzyme reactions, primarily related to protein metabolism. It supports brain development, immune function, and neurotransmitter production.
Red cell folate measures your long-term folate status over the previous 2-3 months. Folate is essential for DNA synthesis, cell division, and red blood cell formation. Particularly important before and during pregnancy to prevent neural tube defects.
Active vitamin B12 (holotranscobalamin) measures the biologically available form of B12 that your cells can actually use. B12 is essential for red blood cell production, nervous system function, and DNA synthesis. Vegans and vegetarians are at higher risk of deficiency.
This test is for screening and information only — it is not a medical diagnosis or professional advice. Please have your results reviewed by a qualified doctor or healthcare provider who can explain what they mean for your personal health situation. If your results show anything outside the normal range, or if you're worried about your health, see your doctor as soon as you can. Don't change any medications or treatments based on these results alone — always talk to your healthcare provider first.
NO CLINICS, NO QUEUES, NO HASSLE
Four steps to clarity
01
Pick your panel
Browse over 200 clinically designed test kits and choose the one that fits your goals.
02
Kit to your door
Everything you need arrives in discreet packaging with step-by-step instructions inside.
03
Collect your sample
Follow the simple instructions in your kit — whether it's a finger-prick at home or a venous draw at a partner clinic.
04
Insights delivered
Clear, easy-to-understand results sent to you online with actionable health guidance.
Frequently asked questions
No. Vitamin levels are not significantly affected by recent food intake.
Yes. Recent supplementation (within 24-48 hours) can significantly affect results for water-soluble vitamins. For a baseline measurement, stop supplements 48 hours before testing. To check if supplementation is working, continue as normal.
Common signs include fatigue, weakness, poor immune function, and impaired wound healing. Specific deficiencies have specific symptoms — your results report will explain what low levels may mean for each vitamin tested.
If supplementing for a confirmed deficiency, retest every 3-6 months. For screening, annual testing is reasonable, especially during winter (for vitamin D) or if on a restricted diet.
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