| Ordering Code | 270 |
|---|---|
| Test Name | Vitamin B12 / Folate |
| Alias | Cobalamin/Folic Acid |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Serum in Plain (Red) |
| Optimum Volume | 0.7 mL |
| Collection Instructions | Fasting recommended, but not required Avoid prolonged exposure to light. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated |
| Specimen Stability | Ambient: 2 Hours Refrigerated: 2 Days Frozen: 1 Month |
| Rejection Criteria | Hemolyzed, Insufficient quantity, Plasma, Specimen older than stability limits, Prolonged exposure to light, Received ambient >2 hours old |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | See individual analytes |
Reference range(s)
The reference ranges listed below are valid on this date of June 29, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Vitamin B12 | ALL | 232-1245 | 232-1245 | pg/mL | |||||
| Folate, Serum | ALL | >3.1 | >3.1 | ng/mL |