Homocysteine, 24-Hour Urinary Total

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a family history of heart disease, stroke, or kidney problems. It could also be used to monitor conditions like vitamin deficiencies (such as folate or B12) or to check for genetic disorders that affect homocysteine metabolism.

What to Expect Before the Test

No special preparation is needed, but you’ll collect your urine for 24 hours in a container provided. Drink plenty of fluids to ensure you collect all urine, including during sleep. Avoid certain medications (like certain blood pressure or heart medications) that might affect results—check with your provider first.

What the Test Results Mean

Results are typically reported as the total amount of homocysteine excreted in urine over 24 hours. Higher-than-normal levels may suggest increased risk for vascular issues, while lower levels may indicate normal metabolism. Your provider will interpret results in the context of your overall health.

Common Conditions Monitored

This test is often used to evaluate risks for cardiovascular diseases, peripheral artery disease, or conditions linked to high homocysteine levels, such as certain genetic disorders or metabolic syndromes.