Below the range
Common causes of a low Vitamin B12 (Cobalamin)
- Pernicious anemia
- Vegan diet
- Malabsorption
- Metformin or PPI use
Looking for the other direction? See what causes a high Vitamin B12 (Cobalamin).
All tests · Inflammatory & Other Chemistry · Vitamin B12 (Cobalamin)
Below the range
What causes a low Vitamin B12 (Cobalamin)?
Normal range 200-900 pg/mL (148-664 pmol/L SI). Specimen: Serum. See the full Vitamin B12 (Cobalamin) reference page for critical values and nursing considerations.
What is the normal range for Vitamin B12 (Cobalamin)?
The standard teaching reference range for Vitamin B12 (Cobalamin) is 200-900 pg/mL in conventional units, or 148-664 pmol/L in SI units. This value is measured in serum.
| Specimen | Serum |
|---|---|
| Conventional range | 200-900 pg/mL |
| SI range | 148-664 pmol/L |
| Panel | Inflammatory & Other Chemistry |
Full details, including nursing considerations, on the Vitamin B12 (Cobalamin) normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
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