B12blood
Vitamin B12
Measures vitamin B12, needed for nerves and blood formation.
What it measures
The level of vitamin B12 in your blood.
Why it is ordered
To investigate tiredness, numbness or anaemia.
How to prepare
Fasting may be advised.
What happens during the test
A blood sample is drawn from a vein.
Normal ranges
| Group | Normal range |
|---|---|
| Normal | 200 – 900 pg/mL |
Ranges vary slightly between laboratories.
What abnormal results may mean
Low B12 may cause anaemia and nerve symptoms; common in vegetarians.
Related conditions: B12 deficiency, Anaemia
Related tests: CBC
⚠️ Important: Abnormal results do not mean you have a disease. Always discuss your results with your doctor.