Sign in →

Test Code BLOD1247 Riboflavin (Vitamin B2), Plasma

Important Note

Patient must fast for 12-14 hours prior to collection. For infants, draw prior to next feeding.

Additional Codes

Mayo Test Code: VITB2

Useful For

Evaluation of persons who present the signs of ariboflavinosis

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Specimen Type

Plasma Heparin

Shipping Instructions

Send specimen in amber vial to protect from light.

Specimen Required

Patient Preparation: Fasting-overnight (12-14 hours) (infants-draw prior to next feeding).

Supplies: Amber Frosted Tube, 5 mL (T192)

Collection Container/Tube: Green top (heparin)

Submission Container/Tube: Amber vial (T192)

Specimen Volume: 0.5 mL

Collection Instructions:

1. Place heparin collection tube on ice, keep covered.

2. Centrifuge and aliquot to amber vial

3. Freeze immediately

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma Heparin Frozen (preferred) 14 days
  Refrigerated  7 days

Reject Due To


Mild OK; Gross OK


Mild OK; Gross reject


Mild OK; Gross OK


EDTA or serum

Reference Values

Normal: 1-19 mcg/L

Day(s) and Time(s) Performed

Monday, Wednesday, Friday; Evening

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information