Vitamin B3 and Metabolites, Plasma (Sendout)
General Information
- Lab Name
- Lab Code
- 353
- External Test Id
- VITB3
- Description
Useful For:
- Assisting in the diagnosis of suspected vitamin B3 deficiency or toxicity
- May be useful in determining response to therapy
- Synonyms
- Niacin, Niacinamide, Nicotinic Acid, Pyridine, VITB3
- Components
Interpretation
- Method
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
- Reference Range
- Ref. Range Notes
Reference Values:
Nicotinic Acid (Niacin) Cutoff: <5.0 ng/mL Nicotinamide: 5.0-48.0 ng/mL Nicotinuric Acid Cutoff: <5.0 ng/mL - Interferences and Limitations
Cautions: Testing of nonfasting specimens can result in elevated plasma vitamin B3 concentrations, particularly in
patients with dietary supplement use or patients on niacin treatment.
Ordering & Collection
- Specimen Type
- Blood
- Collection
-
Patient Preparation: Fasting 4-8 hours preferred
Collection: 5 mL blood in LAVENDER TOP (EDTA) tube
- Handling Instructions
Outside Laboratories: Centrifuge sample and transfer plasma to a separate aliquot within 2 hours of collection. Refrigerate plasma.
Stability: Refrigerated (Preferred): 28 days; Frozen: 28 days; Ambient: 21 days.
- Quantity
-
Requested: 1.5 mL (EDTA) plasma
Minimum: 0.75 mL (EDTA) plasma
Processing
- Receiving Instructions
Centrifuge sample and transfer plasma to a separate plastic vial within 2 hours of collection. Refrigerate plasma.
Login: SEND1-;REFRIG- RSNDT1: MAYOSD
- RSTYP1: PLS
- RTSRQ1: ;Vitamin B3 and Metabolites (Mayo Test VITB3)
Sendouts, order Mayo Test: VITB3.
Stability: Refrigerated (Preferred): 28 days; Frozen: 28 days; Ambient: 21 days.
- Misc Sendout
Performance
- Lab Department
- Frequency
- Performed: Tuesday, 3 p.m. Report Available: 2-9 days.
- Available STAT?
- No
- Performing Location(s)
-
Sendout Mayo Clinic Laboratories (Superior Drive)
800-533-17103050 Superior Drive NW
Rochester, MN 55901
Billing & Coding
- Billing Comments
CPT: 84591