Pathology Handbook

Vitamins B1, B2, B6

Synonyms

Water soluble vitamins

Clinical Indications

Diagnosis of vitamin B1 (thiamine), B2 (Riboflavin) or B6 (Pyridoxine) deficiency

Measurement of Vitamin B1 may occasionally be useful in patients with suspected alcoholic or nutritional cardiomyopathy, neuropathy or Werniche- Korsakoff Syndrome

The symptoms of B2 deficiency include fatigue and sore lips, mouth and tongue

Vitamin B6 deficiency causes skin lesions, numbness, cramps, depression and confusion

Test Includes

 -

Request Form 

Request on ICE

Availability

If agreed with Consultant Biochemist

Specific Criteria

Must be agreed with the laboratory before sending

Patient Preparation

SAMPLES MUST ONLY BE COLLECTED BETWEEN MONDAY AND THURSDAY

Turnaround Time

Approximately 3 weeks

Specimen

Whole blood collected into lithium heparin tube

Volume

6 mL

Container

Vacutainer green top

Collection

Samples should be transported to laboratory immediately.

Causes for Rejection

Unlabelled sample
Not meeting specific criteria for analysis.  

Reference Range

Vitamin B1

275 - 675 ng TDP/g Hb

Vitamin B2

220 -410 nmol/L

Vitamin B6

18 - 135 nmol/L