Vitamin B12
Clinical Biochemistry
Sample and container requirements
Serum Lithium Heparin Plasma (paediatrics only)
Minimum volume required
Special requirements
None
Patient preparation
Sample viability
Turnaround time
This assay is run throughout the day and night. The in-lab turnaround time is normally less than 24 hours.
Reference range
187 – 883 ng/L (Source: Abbott Diagnostics) Refer to NICE NG239 for interpretation of results
Clinical guidance
The primary functions of Vitamin B12 are in the formation of red blood cells and the maintenance of a healthy nervous system. Please refer to LabTestsOnlineUK to learn more about B12. https://labtestsonline.org.uk/tests/vitamin-b12-and-folate
Notes
Images to go here
This information was last updated on 19 August 2026