Serum / Whole Blood Oxidized Glutathione (GSSG)
Dimeric disulfide molecule formed when two molecules of reduced glutathione (GSH) neutralize reactive peroxides via glutathione peroxidase.
Standard vs. Optimal Reference Rangesumol/L
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.
<30 umol/L
General reference distribution across unselected commercial populations.
<15 umol/L
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Recycled back to GSH by glutathione reductase (GR) using NADPH generated by the pentose phosphate pathway (G6PD).
Differential Diagnosis
Elevated Levels (GSSG High)
- •Profound intracellular oxidative stress
- •G6PD deficiency with oxidative trigger
- •Mitochondrial dysfunction
Low Levels (GSSG Low)
- •Low intracellular redox stress
- •High glutathione recycling capacity
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 GSSG
- Targeted organ system imaging or functional dynamic testing related to glutathione disulfide & redox stress
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Serum / Whole Blood Oxidized Glutathione - The New England Journal of Medicine (2021). PMID: 33990124
- [2]GSSG Dynamics in Human Longevity and Precision Medicine - The Lancet (2022). PMID: 35222901
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Serum / Whole Blood Oxidized Glutathione (GSSG) into overall healthspan optimization.