Type
Blood Testing
Duration
15 min
Sample
Blood (venous)
What's included
4 deliverables in this treatment
- Venous blood draw
- Laboratory analysis of Active B12
- Results report
- Optional clinician consultation
The Vitamin B12 (Active) test measures the biologically active form of B12 in a venous blood sample. Active B12 is crucial for nerve function and red‑cell production, so its level may support assessments of deficiency or neurological health. The test costs £81 plus a £50 phlebotomy fee and evaluates a single biomarker.
About this treatment
Active Vitamin B12, also known as holotranscobalamin, represents the fraction of B12 that is readily available for cellular uptake, making it a more specific indicator of functional B12 status than total B12 alone. This assay uses a venous blood draw to quantify one biomarker—active B12—through a laboratory‑validated method. Results are typically available within 3‑5 business days and are provided in a detailed report that can be reviewed with a healthcare professional. The service fee is £81, with an additional £50 for the phlebotomy appointment. No special preparation is required. Included are the blood collection, laboratory analysis, and a results summary, with optional clinician consultation for interpretation.
Good to know
- Sample
- Blood (venous)
- Markers
- 1 (Active B12)
Who is this for?
Individuals checking for B12 deficiency or neurological health
Treatment highlights
- Venous blood draw
- Laboratory analysis of Active B12
+2 more items in What's included
+ £50 phlebotomy per visit