Active Vitamin B12
Measures the active form of vitamin B12.
UNIQUE BIOMARKERS MEASURED
1
View included biomarker & what each measures
- Active Vitamin B12 (B12)The biologically active fraction of vitamin B12. It can be a more reliable indicator of B12 status than total B12.
Results should be interpreted alongside symptoms and medical history.
Adults wanting to check vitamin B12 levels.
If you are feeling acutely unwell, have severe or rapidly worsening symptoms, or are already under the care of a healthcare professional for a related condition, please speak to them before ordering or alongside testing.
Home finger-prick blood sample, collected by you at home using the supplied kit. Full step-by-step instructions are included.
Collect your sample in the morning where possible.
Collection Confidence Guarantee
- Simple at-home finger-prick collection kit included
- Prepaid Royal Mail Tracked 24 return mailer included
- Analysed by The Doctors Laboratory (UKAS Accredited)
- Free Replacement Kit Guarantee: if your sample clots or is insufficient for laboratory analysis, we dispatch a replacement kit free of charge.
- No hidden test or delivery charges
Drop in any postbox using the prepaid Royal Mail Tracked 24 mailer.
24–72h
This period begins when the laboratory receives and accepts a suitable sample. Times are estimates, not guarantees, and may be affected by sample quality, repeat testing, weekends, bank holidays and laboratory workload.
How You'll Receive Your Results
Once your laboratory analysis is complete, your original laboratory report will be delivered securely to your verified email address.
- Original laboratory PDF report
- Sent to your verified email address
- Secure results delivered via email
- Reports are not stored in your OptiBlood website account
- Please check that your email address is correct before completing your order
Results should be interpreted alongside symptoms and medical history.
A result within the reference range does not rule out a condition, and a result outside the range does not by itself confirm one. Results should be considered alongside your symptoms and medical history.
A laboratory result is information, not a diagnosis. Discuss concerning results, or results that differ from what you expected, with an appropriate healthcare professional. They can interpret your results alongside your symptoms and medical history.
OptiBlood tests provide laboratory information and are not a substitute for medical diagnosis, physical examination or emergency care. Discuss concerning results or symptoms with an appropriate healthcare professional.