Niacin
Test Mnemonic
B3VIT
CPT Codes
- 84591 - QTY (1)
LOINC ®
18244-4
Aliases
- Vitamin B3 and Metabolites, Plasma
- Niacin, Plasma
- Nicotinic Acid
- Vitamin B3
Includes
- Nicotinic Acid (Niacin)
- Nicotinamide
- Nicotinuric Acid
Performing Laboratory
Mayo Clinic Dpt of Lab Med & Pathology
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | EDTA (Lavender) | Refrigerated | Fasting 4 to 8 hours is preferred. Centrifuge and aliquot plasma within 2 hours of collection. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.75 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 21 days |
| Refrigerated | 28 days |
| Frozen | 28 days |
Days Performed
Tue
Turnaround Time
3 - 9 days
Methodology
| Name | Description |
|---|---|
| High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) |
Special Info
This test is New York State approved.
Clinical Info
Fasting 4 to 8 hours preferred as testing of non-fasting specimens can result in elevated plasma vitamin B3 concentrations, particularly in patients with dietary supplement use or patients on niacin treatment. This test can be used in the diagnosis of suspected vitamin B3 deficiency or toxicity and may be useful in determining response to therapy.