B12
Vitamin B12 (cobalamin)
- Group
- Vitamins and minerals
- Sample
- Blood · fasting advised
- unit
- pg/mL
B12Vitamin B12 (cobalamin)
pg/mL
About 200–900 pg/mL (lab-specific)
Source: Laboratory reference ranges
What does it measure?
A vitamin needed for the nervous system and blood formation; found naturally only in animal foods.
Relationship to nutrition
Meat, fish, eggs and dairy provide B12. Vegans, long-term users of metformin or stomach acid medication and people after bariatric surgery are at higher risk of deficiency; regular monitoring is advised.
Before the test
- If you take B12 supplements, ask your doctor before the test.
This page is general information. Reference ranges vary by laboratory, age, sex and pregnancy; the range on your report is the one that applies. Diagnosis and treatment are carried out by your doctor. No values are entered on this page and no data is sent to the server.