At a Glance
Why Get Tested?
To screen for and detect moderate to severe vitamin B deficiencies
When to Get Tested?
When someone has symptoms that may be due to a B vitamin deficiency, is at risk for a deficiency, or has a condition associated with malabsorption. However, most people at risk are treated with vitamin B complex and do not require testing.
A blood sample taken from a vein in your arm.
Test Preparation Needed?
The blood sample is usually collected in the morning after an overnight fast, and preferably before taking any medication.