Erythrocyte Glutathione Reductase Activation (EGRAC / B2)
Functional measurement of erythrocyte glutathione reductase activity before and after in vitro FAD addition.
Standard vs. Optimal Reference RangesCoefficient
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.
1.0 - 1.2 (activation coefficient)
General reference distribution across unselected commercial populations.
<1.2 (adequate B2)
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Riboflavin is phosphorylated into FMN and FAD, essential redox cofactors for glutathione reductase and MTHFR.
Differential Diagnosis
Elevated Levels (EGRAC / B2 High)
- •Vitamin B2 deficiency (EGRAC >1.4 indicates severe deficiency)
Low Levels (EGRAC / B2 Low)
- •Optimal tissue riboflavin sufficiency (EGRAC <1.2)
- •Intact FAD-dependent enzymatic flux
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 EGRAC / B2
- Targeted organ system imaging or functional dynamic testing related to flavin coenzyme sufficiency
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Erythrocyte Glutathione Reductase Activation - The New England Journal of Medicine (2021). PMID: 33990124
- [2]EGRAC / B2 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 Erythrocyte Glutathione Reductase Activation (EGRAC / B2) into overall healthspan optimization.