Why get tested?
To determine if you are at increased risk of a heart attack or stroke; to determine if you are folate-deficient or B12-deficient; to help diagnose a rare inherited disorder called homocystinurina

When to get tested?
If you have had a heart attack or stroke, or as part of a cardiac risk assessment; when a doctor suspects a vitamin B12 or folate deficiency or suspects that an infant or young person may have homocystinuria

Sample required?
A blood sample taken by needle from a vein in the arm; sometimes a urine sample in addition to the blood sample

Note: You may be instructed to fast for 10 to 12 hours prior to this test.