At a Glance
Why Get Tested?
To help determine if you are folate-deficient or vitamin B12-deficient; to determine if you are at increased risk of heart attack or stroke; to help diagnose a rare inherited disorder called homocystinuria
When to Get Tested?
When your healthcare provider suspects that you have a vitamin B12 or folate deficiency; when you have had a heart attack or stroke and do not have traditional risk factors, such as unhealthy lipid levels; as part of routine newborn screening or when a health practitioner suspects that an infant or young person may have homocystinuria
A blood sample taken by needle from a vein in the arm; sometimes a urine sample in addition to the blood sample
Test Preparation Needed?
You may be instructed to fast for 10 to 12 hours prior to this test.