Sample type: Serum

Test name: Active B12/HoloTC a.k.a. holotranscobalamin

Condition / Indication: For those in pregnancy requiring assessment of B12 status. Not indicated in any other patient group

Reference range: >70pmol/mL: Vitamin B12 unlikely; 25-70pmol/mL: Indeterminate range. Possible Vitamin B12 deficiency; <25pmol/mL: Consistent with B12 deficiency

Container: Serum (Gold top)

Ideal volume (mL): 1 mL

Referred outside NBT for analysis? Yes

Discipline: Clinical Biochemistry

Turnaround time: 7 days

Referral location: Dept of Clinical Biochemistry, Gloucester Royal Hospital, Great Western Road, Gloucester, Gloucestershire, GL1 3NN