24-Hour Urine for Uric Acid
- Sample Type
- Urine (24h)
- Fasting
- No
- Unit
- mg/24h
Function
Uric acid is the final oxidation product of purine metabolism in humans. Purines are nitrogenous bases found in certain foods and are also components of human DNA. Most uric acid is dissolved in the blood, filtered by the kidneys, and excreted in the urine. The 24-hour urine collection provides a more accurate assessment of the total daily production and excretion of uric acid than a random 'spot' sample, as levels fluctuate throughout the day based on activity and intake.
Why it is Ordered
This test is primarily used to investigate the cause of high blood uric acid levels (hyperuricemia) or to evaluate patients who suffer from recurrent kidney stones. It helps clinicians determine if the body is overproducing uric acid or if the kidneys are failing to excrete it properly. It is also used to monitor patients undergoing chemotherapy, as the rapid breakdown of cancer cells can release massive amounts of purines into the bloodstream.
Associated Conditions
- Gout: Excessive uric acid can crystallize in joints, causing intense pain.
- Urolithiasis: High urinary uric acid is a major risk factor for uric acid kidney stones.
- Renal Failure: Impaired kidney function leads to decreased excretion.
- Metabolic Syndrome: Often associated with insulin resistance and obesity.
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Uric acid excretion is extremely sensitive to short-term dietary intake. Consumption of high-purine foods (red meat, organ meats, seafood) or alcohol within 48 hours of the test can significantly skew results. Additionally, many common medications, including aspirin, Vitamin C supplements, and diuretics, interfere with renal handling of uric acid. Improper collection of the 24-hour sample (missing a single void) is the most common cause of inaccurate 'low' readings.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for 24-Hour Urine for Uric Acid:
Official Sources
- Uric Acid Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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