Vitamin B12 | KK Women's and Children's Hospital

Specimen Container	Gel separator tube (Adult)
Specimen Requirement	Plain blood Adult: 3 mL Invert blood 5 times after blood collection ensures the clot-activating factors is well mixed with the blood. This will ensure results are reliable.
Orderable as Urgent?	No
Turn Around Time	3 - 4 hrs
Reference Value(s)	< 5 days: No reference ranges 5 days to <1 yrs: 191 - 1163 pmol/L 1 yrs to < 9 yrs: 209 - 1190 pmol/L 9 yrs to 14 yrs: 186 - 830 pmol/L 14 yrs to <17 yrs: 180-655 pmol/L 17 yrs to <19 yrs: 150-599 pmol/L 19 yrs and above: 138 - 652 pmol/L
Testing Laboratory Location	KKH
Laboratory	Clinical Chemistry
Contact Number	6394 1383
Day and Time Performed	Mon - Fri: 0800 hrs to 1700 hrs Sat: 0800 hrs - 1230 hrs
Orderable on CPOE?	Yes
Downtime Form	Clinical Chemistry - Form A

Change History Notes

27 May 2024 08:00 AM

Update of Specimen Requirement.
14 Oct 2021 01:45 PM

Updated Specimen Requirement, Turn Around Time and Day and Time Performed.

Last Updated - 19 Jun 2025