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Test Code VTB2P Vitamin B 2 (Riboflavin), Plasma

Additional Codes

Epic: LAB1091

Quest: 36399

Specimen Required

Patient Preparation: Overnight fasting is required. Avoidance of vitamin supplements for 24 hours prior to collection is preferred.

Specimen Type: Plasma EDTA

Collection Container/Type: Lavender top (EDTA)

Submission Container/Tube: Amber vial

Specimen Volume: 2 mL

Collection Instructions: 

  1. Centrifuge and aliquot plasma into amber vial.

Additional Information:

  • Protect from light

Specimen Minimum Volume

0.5 mL

Specimen Stability

Room temperature: 4 hours

Refrigerated: 24 hours

Frozen: 30 days

Reference Range

6.2-39.0 nmol/L

Rejection Due To

Received room temperature • Received refrigerated

Day(s) and Time(s) Performed

Tues-Sat a.m.

Report Available

4-5 days

Clinical Significance

Vitamin B2 is involved in metabolism of fats, carbohydrates, and protein. The clinical manifestations of deficiency are non-specific. Clinical manifestations include mucocutaneous lesions of the mouth and skin, corneal vascularization, anemia, and personality changes.

Method Name

Chromatography/Mass Spectrometry

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

CPT Code(s)


Performing Laboratory

Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia, CA 91355-5386