Vitamin B3 (Niacin and Metabolite)
Also known as: Niacin, Nicotinamide, Nicotinic Acid
Use
Measurement of vitamin B3 level as nicotinic acid and nicotinamide.
Special Instructions
To avoid delays in turnaround time when requesting multiple tests on frozen specimens, it is advised to submit separate frozen specimens for each test requested.
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration. The test may not detect all forms of niacin deficiency if it is caused by factors unrelated to direct dietary intake or absorption, such as certain metabolic disorders or drug interactions.
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 56961-6
- 18244-4
Result Turnaround Time
4-10 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1.5 mL
Minimum Volume
1 mL
Container
Red-top tube
Collection Instructions
Transfer the serum into a LabCorp PP transpak frozen purple tube with screw cap (LabCorp N° 049482). The specimen should be frozen immediately and maintained frozen until tested. Include the patient's age on the test request form.
Storage Instructions
Freeze.
Causes for Rejection
Gel-barrier tube; specimen not frozen
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unstable |
| Refrigerated | Unstable |
| Frozen | 14 days |