Urinary Isocitric Acid (Isocitrate)
Tricarboxylic acid intermediate oxidized to alpha-ketoglutarate by NAD-dependent and NADP-dependent isocitrate dehydrogenases (IDH).
Standard vs. Optimal Reference Rangesug/mg Cr
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.
15 - 65 ug/mg Cr
General reference distribution across unselected commercial populations.
20 - 50 ug/mg Cr
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Catalyzes oxidative decarboxylation generating NADH/NADPH; rate-limiting control point for downstream mitochondrial respiration.
Differential Diagnosis
Elevated Levels (Isocitrate High)
- •Manganese or magnesium cofactor deficiency
- •IDH block in mitochondrial energy cascade
Low Levels (Isocitrate Low)
- •Normal oxidative decarboxylation flux
- •Adequate NADPH generation
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 Isocitrate
- Targeted organ system imaging or functional dynamic testing related to isocitrate dehydrogenase flux
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Urinary Isocitric Acid - The New England Journal of Medicine (2021). PMID: 34190124
- [2]Isocitrate Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35422901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Urinary Isocitric Acid (Isocitrate) into overall healthspan optimization.