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HelpTest Code VITB3 Vitamin B3 and Metabolites, Plasma
Reporting Name
Vitamin B3 and Metabolites, PPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Assisting in the diagnosis of suspected vitamin B3 deficiency or toxicity
May be useful in determining response to therapy
Specimen Required
Patient Preparation: Fasting 4 to 8 hours preferred
Supplies: Sarstedt Aliquot Tube 5 mL (T914)
Collection Container/Tube:
Preferred: Lavender top (K2 EDTA)
Acceptable: K3 EDTA
Submission Container/Tube: Plastic vial
Specimen Volume: 1.5 mL
Collection Instructions: Centrifuge and aliquot plasma into a plastic vial within 2 hours of collection.
Specimen Minimum Volume
0.75 mL
Specimen Type
Plasma EDTASpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma EDTA | Refrigerated (preferred) | 28 days |
| Frozen | 28 days | |
| Ambient | 21 days |
Day(s) Performed
Monday, Tuesday, Thursday, Friday
Reference Values
Nicotinic Acid (Niacin) Cutoff: <5.0 ng/mL
Nicotinamide: 5.0-48.0 ng/mL
Nicotinuric Acid Cutoff: <5.0 ng/mL
Report Available
2 to 4 daysMethod Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
84591
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| VITB3 | Vitamin B3 and Metabolites, P | 102102-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 609493 | Nicotinic Acid (Niacin) | 18244-4 |
| 609494 | Nicotinamide | 56961-6 |
| 609495 | Nicotinuric Acid | 72306-4 |