Pathology tests database

Sample and container requirements

EDTA Whole Blood

Minimum volume required

1 mL whole blood

Special requirements

Sample required is EDTA whole blood (do not separate) and it must be protected from light (wrap it in aluminium foil).

Patient preparation

Patients should be fasted and the sample collected in the morning prior to any medication. Avoid measurement of vitamin B6 during a severe acute phase response eg surgery, allowing at least 14 days afterwards.

Sample viability

Turnaround time

21 days

Reference range

Vitamin B1: 66.5 – 200 nmol/L Vitamin B6: 44 – 168 nmol/L (Source: Chromsystems)

Clinical guidance

Please refer to LabTestsOnlineUK to learn more about vitamins B1 and B6. https://labtestsonline.org.uk/tests/b-vitamins

Notes

Protect sample from light immediately after collection.