Home
HelpTest Code VITB3 Vitamin B3 and Metabolites, Plasma
Specimen Required
Patient Preparation:
Fasting: 4 hours, preferred but not required
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 Type
Plasma EDTASpecimen Minimum Volume
0.75 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| 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