Why get tested?
To help diagnose the cause of anaemia or neuropathy (nerve damage), to evaluate nutritional status in some patients, to monitor effectiveness of treatment for B12 or folate deficiency

When to get tested?
When you have large red blood cells, when you have symptoms of anaemia and/or of neuropathy. When you are being treated for B12 or folate deficiency

Sample required?
A blood sample taken from a vein in your arm