Uric Acid (Urate), 24-Hour Urine — Excretion Rate
Measures the amount of uric acid excreted in urine over 24 hours, which can help assess uric acid metabolism and kidney stone risk.
["This test measures how much uric acid your body releases into urine over one full day."]
Key facts at a glance
- LOINC
- 57600-9
- Short code
- 6A-OH-THS 2D p high Dex 24h Ur-mRate
- Synonyms
- 6A-OH-THS 2D p high Dex 24h Ur-mRate
- Category
- liver
- 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
What is this test?
This test measures the amount of uric acid, also called urate, passed in your urine over a 24-hour collection period. It reflects your body’s uric acid production and urinary excretion more completely than a single urine sample.
Why might I need this test?
A clinician may order this test when evaluating gout, uric acid kidney stones, or unusual urinary uric acid levels. It may also be used to monitor treatment or changes that affect uric acid, including certain medications and dietary factors.
How is the test performed?
You collect all urine into a labeled container for exactly 24 hours. The laboratory measures the total urine volume and the amount of uric acid in the collected urine, then calculates the 24-hour excretion rate.
How do I prepare for the test?
Follow the collection instructions provided by your healthcare professional, including when to start and stop. Record the total urine volume if requested, keep the container tightly closed, and refrigerate or transport it as instructed. Missing urine or collecting for a period other than 24 hours can make the result inaccurate.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A higher-than-expected urinary uric acid excretion may occur with increased uric acid production, gout, certain medications, or conditions that increase cell turnover. A lower-than-expected rate may reflect reduced kidney function, dehydration, or other factors affecting urinary excretion. An abnormal result should be interpreted with symptoms, diet, medications, and other kidney or blood tests.
Short name
24-Hour Urine Uric Acid
Frequently asked questions
Is this the same as a routine urine uric acid test?
What foods or medicines can affect the result?
What happens if part of the urine collection is missed?
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