Description
Why It’s Done:
This test is ordered to:
• Diagnose and assess autoimmune gastritis and pernicious anemia
• Investigate unexplained vitamin B12 deficiency
• Evaluate patients presenting with symptoms of B12 deficiency such as fatigue, neurological symptoms, or anemia
• Monitor progression or response to treatment in autoimmune gastric conditions
Preparation:
• No special preparation is necessary.
• A blood sample is drawn from a vein, usually in the arm.
• Inform your healthcare provider about any medications or supplements you are taking, especially vitamin B12 or acid-reducing drugs.
• Fasting is not required.


