Vitamin B2 (riboflavin) Blood Test
£102 ✓ 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
From order to results in four simple steps. Full transparency on where each step happens and what it costs.
Receive your kit by post
Dispatched same working day if ordered before 3pm. Royal Mail Tracked delivery, typically 1–3 working days. 90% of kits arrive within 24 hours.
Visit a partner clinic
Book a phlebotomy appointment at one of our 365+ UK partner clinics. Take your kit with you — the phlebotomist will collect your sample using the materials provided.
Phlebotomy fee applies (paid at clinic)
Venous blood draw at a clinic
A trained phlebotomist takes a small blood sample from a vein in your arm using the vacutainers provided in your kit. The appointment takes around 10 minutes.
Return by prepaid envelope
Seal your sample in the biohazard bag provided and drop it in any Royal Mail postbox using the prepaid Tracked 24 envelope. Post Monday–Thursday for best results.
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 B2 (riboflavin) is a water-soluble B vitamin crucial for cell metabolism, converting food into energy, proper functioning of the central nervous system, and the formation of red blood cells. It serves as a precursor for flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN)—coenzymes involved in energy production, cellular function, and the metabolism of fats, drugs, and steroids. Riboflavin also functions as an antioxidant, helping to neutralise harmful free radicals. The body cannot store large amounts of riboflavin, so regular dietary intake is essential. Deficiency is rare but can cause symptoms including anaemia, fatigue, slowed metabolism, nerve damage, a swollen or sore tongue (glossitis), mouth sores and cracks at the corners of the mouth (angular cheilitis), skin inflammation, sore throat, swelling of mucous membranes, and mood changes. Good dietary sources include almonds, whole grains, mushrooms, dairy products, eggs, and green vegetables. Results outside the normal range may need a follow-up with your GP.
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
This test measures Vitamin B2 (Riboflavin). Check the full biomarker list on this page for detailed descriptions of each marker and what it tells you about your health.
Check the Special Instructions section on this page. As a general rule, if the panel includes cholesterol, triglycerides, glucose, or insulin, fast for 8-12 hours. For most hormone, vitamin, and antibody tests, fasting is not required. Morning collection (7-10am) is preferred.
Follow the instructions in your kit. For finger-prick tests: warm your hands, use the lancet as directed, fill the tube to the marked line. For venous tests: attend a phlebotomy clinic with your laboratory request form. Post your sample the same day — avoid Fridays and bank holidays.
Results are typically available within the timeframe shown on this page. You will receive a notification when ready to view online. Results include reference ranges and guidance.
You may also be interested in
Advanced Vitamins Blood Test
A 10-biomarker venous blood panel covering fat-soluble vitamins and b vitamins — ideal for investigating relevant symptoms or monitoring health.
Results estimated in 3 working days
10 biomarkers
Venous collection
Ultimate Performance Blood Test Kit
A 56-biomarker venous blood panel covering cholesterol status, diabetes, liver function and other key health markers — ideal for athletes and active people tracking training adaptation, recovery, and performance.
Results estimated in 3 working days
56 biomarkers
Driver's Tiredness Blood Test
A 6-biomarker venous blood panel covering inflammation, iron status, thyroid hormones and vitamins — ideal for investigating ongoing tiredness, low energy, or suspected medical causes.
Results estimated in 5 working days
6 biomarkers