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HelpTest Code VITB3 Vitamin B3 and Metabolites, Plasma
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.
Useful For
Assisting in the diagnosis of suspected vitamin B3 deficiency or toxicity
May be useful in determining response to therapy
Reporting Name
Vitamin B3 and Metabolites, PSpecimen Type
Plasma EDTASpecimen Minimum Volume
0.75 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Plasma EDTA | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 21 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | OK |
Reference Values
Nicotinic Acid (Niacin) Cutoff: <5.0 ng/mL
Nicotinamide: 5.0-48.0 ng/mL
Nicotinuric Acid Cutoff: <5.0 ng/mL
Day(s) Performed
Monday, Tuesday, Thursday, Friday
Report Available
2 to 4 daysSpecimen Retention Time
2 weeksPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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 |