24-Hour Urinary Uric Acid (24h U-Uric Acid)
Total mass of uric acid end product of purine nucleotide catabolism excreted by the kidneys over 24 hours.
Standard vs. Optimal Reference Rangesmg/24 hr
Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.
Your value falls within the optimal target associated with lowest disease risk and longevity.
<750 mg/24 hr (females), <800 mg/24 hr (males)
General reference distribution across unselected commercial populations.
<600 mg/24 hr
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Filtered by glomeruli, reabsorbed by URAT1, and secreted in tubules; high urinary concentration drives pure uric acid and mixed calcium stones.
Differential Diagnosis
Elevated Levels (24h U-Uric Acid High)
- •Uric acid overproduction (high purine intake, myeloproliferative disorders, tumor lysis)
- •Gout with hyperuricosuria
- •Uric acid nephrolithiasis
Low Levels (24h U-Uric Acid Low)
- •Uric acid underexcretion (impaired renal clearance)
- •Renal failure
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Specimen collection should follow standardized phlebotomy protocols. Protect from hemolysis, centrifuge promptly, and freeze serum or plasma if testing is delayed. Patient should be in a resting, fasting state where indicated.
Reflexive Testing Protocol:
- Confirmatory testing and secondary biomarker quantification for 24h U-Uric Acid
- Targeted organ system imaging or functional dynamic testing related to purine turnover & uric acid stones
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of 24-Hour Urinary Uric Acid - The New England Journal of Medicine (2021). PMID: 34090124
- [2]24h U-Uric Acid Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35322901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate 24-Hour Urinary Uric Acid (24h U-Uric Acid) into overall healthspan optimization.