At a Glance
Why Get Tested?
When to Get Tested?
When you have large red blood cells, specifically when you have symptoms of anaemia and/or of neuropathy. When you are being treated for vitamin B12 or folate deficiency
A blood sample taken from a vein in your arm
Test Preparation Needed?
Fasting is not required for a standard vitamin B12 test. Certain medicines and pregnancy may affect the test results; your heathcare professional will advise you on which ones to stop taking.