Homocysteine Rate (24-Hour Urine)
This test measures how much homocysteine, a chemical produced during normal metabolism, appears in your urine over a full day. It helps assess your risk for certain health conditions linked to high homocysteine levels.
["This test helps evaluate long-term homocysteine exposure, which may indicate metabolic or genetic factors affecting your health."]
Key facts at a glance
- LOINC
- 25441-7
- Short code
- (Hcys)2 24h Ur-sRate
- Synonyms
- (Hcys)2 24h Ur-sRate
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have a history of conditions like heart disease, stroke, or kidney problems, or if you have a family history of these issues. It may also be used to monitor treatment effectiveness for conditions linked to homocysteine, such as certain genetic disorders.
What to Expect Before the Test
No special preparation is needed for this test. You’ll provide a 24-hour urine sample collected in a container, typically starting after your first morning urine void and continuing until the next morning’s urine. Drink plenty of fluids to help collect the full sample.
How the Test Works
The urine sample is analyzed to measure homocysteine levels over time. The test measures the rate at which homocysteine is excreted in urine, reflecting overall metabolic processing and potential genetic or metabolic influences.
What the Results Mean
Results are not provided with specific reference ranges. Instead, they are used to compare your rate to expected patterns for your age, sex, and health status. High rates may signal underlying metabolic issues or conditions requiring further evaluation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated homocysteine rates in urine may indicate conditions like homocystinuria (a genetic disorder), kidney disease, or deficiencies in certain vitamins (like folate or B12). Chronic high levels are associated with an increased risk of cardiovascular disease, so early detection can guide preventive care.
Short name
24-Hour Homocysteine Urine Rate
Frequently asked questions
How long does it take to get my results?
What causes a high homocysteine rate in urine?
Can I take supplements to lower homocysteine levels?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy