Panel guide
Vitamin B12
Vitamin B12 (cobalamin) is measured in blood to assess B12 status.
General biomarker education — not personalized medical advice. Learn more
What it measures
Serum vitamin B12 is commonly reported in pg/mL. Some laboratories also offer related markers such as methylmalonic acid when clinically indicated.
Why people track it
B12 appears on many vitamin panels. Confirmed historical values can help you prepare questions for your clinician.
How to read your report
Reference intervals differ. Compare the extracted value, unit, and range with your original laboratory report before confirming.
Important note
This is general information about laboratory markers. It is not a diagnosis, treatment plan, or personalized medical advice. Discuss your results with your clinician.
Upload the report you just learned to read
Confirm extracted values against your source PDF. Charts use the range printed on that report.
See how it works →Questions for your clinician
- Is my B12 result in a range you consider adequate for me?
- Would any related tests add useful context?