Homocysteine (serum/plasma) concentration

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms of conditions like high blood pressure, heart disease, or stroke. It may also be used to monitor people with a family history of heart disease, kidney problems, or certain genetic disorders. Sometimes, it’s checked as part of a routine blood test if risk factors for elevated homocysteine are present.

What Does the Result Mean?

Elevated homocysteine levels might suggest an increased risk of blood vessel damage or heart-related issues. Lower-than-expected levels may not indicate a problem but could be due to certain medications or genetic factors. Your provider will discuss results in the context of your overall health.

How Is This Test Performed?

A blood sample is taken from a vein, usually in your arm. The blood is sent to a lab where it is analyzed to measure homocysteine concentration using a specialized immunoassay method. No special preparation is needed, but fasting may be advised depending on your provider’s instructions.

What Are Common Causes of Abnormal Results?

High homocysteine levels can be caused by factors like poor nutrition (low vitamin B6, B12, or folate), kidney disease, certain medications, or genetic conditions. Low levels may occur with certain medications or naturally in some people.