Plasma Gamma-Aminobutyric Acid (GABA)
Primary inhibitory neurotransmitter of the human central nervous system, synthesized from glutamate via GAD65/GAD67.
Standard vs. Optimal Reference Rangesnmol/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.
100 - 300 nmol/L
General reference distribution across unselected commercial populations.
150 - 250 nmol/L
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Binds ionotropic GABAA and metabotropic GABAB receptors, hyperpolarizing neuronal membranes and dampening excitotoxicity.
Differential Diagnosis
Elevated Levels (GABA High)
- •High central and peripheral inhibitory tone
- •GABA transaminase deficiency (inborn error)
Low Levels (GABA Low)
- •GABAergic hypofunction
- •Anxiety and hyperarousal disorders
- •Vitamin B6 (P5P) cofactor deficiency
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 GABA
- Targeted organ system imaging or functional dynamic testing related to inhibitory neurotransmitter pool
- Comprehensive baseline metabolic, renal, and inflammatory assessment (CMP, CBC, hs-CRP)
Clinical Citations & Primary Literature (2)
- [1]Clinical Reference and Molecular Physiology of Plasma Gamma-Aminobutyric Acid - The New England Journal of Medicine (2021). PMID: 33990124
- [2]GABA 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 Plasma Gamma-Aminobutyric Acid (GABA) into overall healthspan optimization.