The autoimmune destruction of gastric parietal cells (and autoantibody inactivation of intrinsic factor) leads to a lack of intrinsic factor. Since the absorption from the gut of normal dietary amounts of vitamin B12 is dependent on intrinsic factor, the loss of intrinsic factor leads to vitamin B12 deficiency. The loss of ability to absorb vitamin B12 is the most common cause of adult vitamin B12 deficiency.
Tube
01 (SE) – Serum Gel
ID
Tests&Tubes0070
Additional information
A GIFab sample should not be collected from a patient who has received a vitamin B12 injection in the last week as free vitamin B12 can give a false positive result.
Turn around
Due to extended service pressures please note our TAT have been temporarily extended by 6 weeks beyond the times stated above/below. Please do not contact the lab before this time frame unless there is a clinically urgent need.
Send to
Blood Sciences LGI
Contact
For further details please contact Leeds Pathology customer services: [email protected].
Collection Con
Samples must be less than 48 hours old when received in the laboratory. Samples from external referral sites must be separated and frozen prior to transport.
Sample REQ
Blood
Minimum volume 555uL serum
Ref. Range Notes
Units
AU/mL