Test Directory

Vitamin B6

Containers - Adult

LithiumHeparinOrangeCap4.7.jpg
Orange Cap
Volume Range

​2.0 mL

Additive per Container

​Lithium heparin (non gel)

RedCapTubeEDTAKE2.7ml.jpg
Red/Pink Cap
Volume Range

​2.0 mL

Additive per Container

​Potassium EDTA

Containers - Child

OrangeCapPaediatric.jpg
Orange Cap - Paediatric
Volume Range

​2.0 mL

Additive per Container

​Lithium heparin

Reference ranges

​Red cell pyridoxal 5' phosphate: 250-680 pmol/g Hb

<200 pmol/g Hb (at risk of deficiency)

>2000 pmol/g Hb (over supplementation)

>4000 pmol/g Hb (risk of toxicity)

Laboratory Site

Glasgow Royal Infirmary
84 Castle Street
Glasgow
G4 0SF
Telephone: 0141 211 4000

Sample storage arrangements

Protect sample from light.

Special instructions for collection

Fasting sample or 8 hours after supplementation is recommended.

Anticipated turnaround

​28 days

General additional information