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Niacin (Vitamin B3)

Nictonic Acid, Niacin (Vitamin B₃)

Test Codes

MAYO: FNIAC, EPIC: LAB6634, SOFT: XNIAC

Department

Send Outs

Specimen Collection Criteria

Collect: Two Lavender-top EDTA tubes.

• Protect specimen from light.
• Send specimen for processing immediately after collection.

Physician Office/Draw Specimen Preparation

Protect specimen from light. Centrifuge to separate plasma from cells within 30 minutes of collection. Transfer plasma to an amber plastic transport tube and freeze (-20°C/-4°F or below).

Preparation for Courier Transport

Transport: 4.0 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 1.0 mL).

Rejection Criteria

• Grossly hemolyzed specimens.
• Grossly lipemic specimens.
• Specimens not collected and processed as indicated.

Inpatient Specimen Preparation

Protect specimen from light. Transport light-protected specimen to the Laboratory immediately for processing.

In-Lab Processing

Protect specimen from light. Centrifuge to separate plasma from cells within 30 minutes of collection. Transfer plasma to an amber plastic transport tube and freeze (-20°C/-4°F or below).

Transport: 4.0 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 1.0 mL).

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 48 hours
Frozen (-20°C/-4°F or below): 56 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Medical Laboratories, Rochester, MN, forwarded to Cambridge Biomedical, Boston, MA.

Performed

Varies.
Results available in 2-10 days.

Reference Range

By report.

Test Methodology

High Performance Liquid Chromatography (HPLC).

Interpretation

By report.

Clinical Utility

This assay provides specific quantitation of a patient's niacin level.

CPT Codes

84591
LOINC:  18244-4

Contacts

Last Updated

7/9/2021