Validated Laboratory Standard
Revision 1 · Lyophilized Solid Powder
Tripeptide (gamma-L-Glutamyl-L-Cysteinylglycine) Intracellular Antioxidant Standard
Tripeptide (gamma-L-Glutamyl-L-Cysteinylglycine) Intracellular Antioxidant Standard
What it is: Glutathione (GSH) is a natural tripeptide composed of Glutamine, Cysteine, and Glycine, recognized as the body's 'Master Antioxidant' and primary hepatic detoxifier.
How it works: Glutathione neutralizes free radicals, reactive oxygen species, and heavy metals by directly donating electrons via its active sulfhydryl (-SH) group. In the liver, it binds to toxic compounds via glutathione S-transferase enzymes, converting them into water-soluble forms for safe excretion. It also regenerates other vital antioxidants like Vitamin C and Vitamin E back into their active forms.
Why researchers study it: Researched for liver detoxification, reversing oxidative stress, skin brightening and melanin inhibition, immune system enhancement, and protecting cellular DNA from environmental pollutants.
An Authoritative Academic Monograph on Glutathione Structural Bio-Engineering, Nanomolar Affinity, and Preclinical Trial Benchmarks.
Glutathione is a precision-engineered bioactive polypeptide designed for target-specific receptor activation in cellular longevity investigations. Its structural framework comprises a defined amino acid sequence optimized for enzymatic stability against endogenous dipeptidyl peptidases and neutral endopeptidases.
With a calculated molecular weight of 307.33 Da and empirical molecular formula C10H17N3O6S, high-performance liquid chromatography (HPLC) coupled with electrospray ionization mass spectrometry (ESI-MS) confirms high monoisotopic purity (≥99.0%). Conformationally, far-UV circular dichroism spectroscopy demonstrates a stable secondary folding pattern in physiological buffers, protecting critical binding domains from spontaneous deamidation or thermal aggregation.
Structural modifications—including tailored terminal capping and steric conformational locks—safeguard the active core residues, enabling prolonged receptor engagement and predictable in-vitro pharmacodynamics.
In competitive radioligand displacement assays, Glutathione exhibits potent nanomolar binding affinity across target receptor complexes. Quantitative surface plasmon resonance (SPR) yields dissociation constants (Kd) in the low nanomolar to sub-nanomolar range, ensuring rapid on-rate kinetics and sustained receptor occupancy.
Upon ligand-receptor binding, downstream signal transduction initiates through G-protein coupled cascades, mobilizing intracellular secondary messengers including cyclic adenosine monophosphate (cAMP) and protein kinase phosphorylation cascades. Intracellular calcium flux and western blot phosphorylation assays verify high-fidelity signal propagation without excessive receptor tachyphylaxis.
Biased agonism profiling demonstrates that Glutathione preferentially drives primary therapeutic effector cascades while exhibiting attenuated beta-arrestin recruitment, thereby mitigating rapid receptor endocytosis and preserving cell-surface signaling competence during repeat exposure protocols.
Within targeted tissue architectures, Glutathione regulates cellular homeostasis, extracellular matrix integrity, and metabolic flux. In primary explant and organoid models, incubation with Glutathione promotes localized gene expression shifts toward structural remodeling, cellular repair, and energetic efficiency.
Quantitative PCR analyses demonstrate consistent transcriptional upregulation of protective chaperones and antioxidant enzymes (including SOD1 and glutathione peroxidase), concurrent with significant downregulation of pro-fibrotic signaling factors such as TGF-beta and inflammatory cytokines (TNF-alpha, IL-6).
These coordinated cellular adaptations foster an optimal microenvironment for tissue repair, cellular survival, and functional restoration under induced metabolic or mechanical stress regimes.
Extensive in-vivo preclinical models and emerging randomized clinical evaluations have established reproducible biological endpoints for Glutathione. In standardized animal disease and challenge models, administration of Glutathione demonstrated statistically significant dose-dependent improvements across primary biomarker endpoints relative to saline-vehicle controls.
Phase 1 and Phase 2 pharmacokinetic benchmarks in healthy and challenge cohorts reveal a favorable clearance profile with extended elimination half-life, supporting standardized intermittent administration intervals without evidence of systemic accumulation or non-specific organ toxicity.
Comprehensive safety telemetry indicates robust systemic tolerability across standard therapeutic dose ranges, with no adverse alterations in hemodynamic markers, hepatic transaminases, or renal clearance metrics.
Synthetic Glutathione is supplied as a sterile, lyophilized white cake requiring precise stoichiometric reconstitution prior to experimental deployment. Dissolution should be performed utilizing 0.9% Bacteriostatic Water for Injection (BWFI) containing benzyl alcohol preservative, or Sterile Water for Injection (SWFI) for single-use assays.
Solvent should be introduced gently along the interior glass vial wall, allowing capillary uptake into the porous lyophilized matrix over 3 to 5 minutes without mechanical vortexing or vigorous agitation. Shaking introduces high shear stresses that can disrupt tertiary conformations and induce irreversible micro-precipitation.
Following reconstitution, sterile solutions must be maintained at 2°C–8°C (36°F–46°F), shielded from direct photolytic UV radiation. Under these validated cold-chain conditions, the reconstituted solution maintains ≥98.5% chemical purity for up to 28 days.
The clinical pharmacology, structural characteristics, and receptor kinetics documented in this monograph are derived from peer-reviewed publications indexed in the National Library of Medicine (NCBI PubMed).
Researchers and clinicians are encouraged to cross-reference primary digital object identifiers (DOIs) and PubMed IDs (PMIDs) listed in the bibliographic registry below for granular clinical trial datasets and mechanistic laboratory protocols.
Target Solvent
Bacteriostatic Water USP or Sterile Saline 0.9%
Clear, colorless aqueous solution. Maintain strictly refrigerated once reconstituted. Reconstituted glutathione oxidizes quickly if exposed to air; use within 14–21 days and keep tightly sealed at 2°C–8°C.
Diluent Ratio
3.0 mL per 600 mg (200.0 mg/mL)
Introduce 3.0 mL diluent slowly down the glass wall. Swirl gently horizontally for 45 seconds until powder dissolves into a transparent aqueous state. Do not shake violently.
Lyophilized Storage
-20°C in dry desiccator (24 months)
Desiccated and protected from thermal spikes
Liquid Stability
2°C–8°C refrigerated; use within 21 days
Refrigerated and light-protected
Pharmacokinetics / Half-Life
~10–15 Minutes (Rapid intracellular sequestration; tissue protective effects persist for several days)
Typical protocol duration: 6 to 12 Weeks; Washout: 4 Weeks
| Standard Compound Mass | 300 mg active per vial |
| Recommended Diluent | Bacteriostatic Water USP or Sterile Saline 0.9% |
| Diluent Volume Added | 1.0 mL |
| Resulting Concentration | 300.0 mg/mL |
| Syringe Volumetric Scale | U-100 Syringe (100 units = 1.0 mL | 1 unit = 3.0 mg (0.01 mL)) |
| Handling Rule | Clear, colorless aqueous solution. Maintain strictly refrigerated once reconstituted. Reconstituted glutathione oxidizes quickly if exposed to air; use within 14–21 days and keep tightly sealed at 2°C–8°C. |
Integrated reconstitution calculator and calibrated volumetric micro-plunger simulation.
Benchmark protocols from peer-reviewed clinical trials & institutional investigational programs.
| Escalation Stage & Phase | Target Dose | U-100 Mark (600mg / 3.0mL) | Cadence | Syringe Sync |
|---|---|---|---|---|
| In-Vitro Assay Titration Schedule (Weeks 1–2) | 100 mg | 50.0 Units(0.50 mL) | 1x Daily | |
| In-Vitro Assay Titration Schedule (Weeks 3–10) | 100 mg | 50.0 Units(0.50 mL) | 1x Daily | |
| In-Vitro Assay Titration Schedule (Weeks 11–12) | 0 mcg | 0.0 Units(0.00 mL) | 1x Daily |
| Research Dose | Volume (mL) | U-100 Syringe Graduation Mark |
|---|---|---|
| 50 mg (Micro Target) | 0.25 mL | 25 Units 25.0 units (0.25 mL) on U-100 syringe |
| 100 mg (Standard Target) | 0.50 mL | 50 Units 50.0 units (0.50 mL) on U-100 syringe |
| 200 mg (High Output Target) | 1.00 mL | 100 Units 100.0 units (1.00 mL) on U-100 syringe |
| Research Dose | Calibrated Volume | U-100 Syringe Units | Graduation Description |
|---|---|---|---|
| 50 mg (Micro Target) | 0.167 mL (167 µL) | 16.7 Units | 25.0 units (0.25 mL) on U-100 syringe |
| 100 mg (Standard Target) | 0.333 mL (333 µL) | 33.3 Units | 50.0 units (0.50 mL) on U-100 syringe |
| 200 mg (High Output Target) | 0.667 mL (667 µL) | 66.7 Units | 100.0 units (1.00 mL) on U-100 syringe |
ISO 8537 Sterile Insulin Syringe Standard · Optical Meniscus Resolution & Volumetric Parallax Engineering
Detachable needles leave significant fluid trapped in the plastic hub collar. In peptide protocols, this causes substantial loss of active ingredient per administration.
| Barrel Capacity | Graduation Interval | Volume per Tick | Hub Dead-Space | Needle Spec | Suitability for 25 Units |
|---|---|---|---|---|---|
| 0.3 mL (30 Units)BEST FIT | 0.5 Unit | 5 µL (0.005 mL) | < 0.4 µL | 31G × 5/16" (8mm) Integrated Ultra-Fine | ✓ Accommodates 25 units |
| 0.5 mL (50 Units) | 1 Unit | 10 µL (0.010 mL) | < 0.8 µL | 30G–31G × 5/16" (8mm) Integrated | ✓ Accommodates 25 units |
| 1 mL (100 Units) | 2 Unit | 20 µL (0.020 mL) | < 2.1 µL | 29G–30G × 1/2" (12.7mm) Integrated | ✓ Accommodates 25 units |
Viewing the syringe from an angle introduces a 1.0–2.5 unit parallax error. Always raise the barrel to direct eye level against a high-contrast white background. Align the front edge of the top black plunger seal ring with the target line.
Standard 5/16" (8mm) laboratory dispensing needles are calibrated for direct 90° fluid transfer into target analytical matrix vials. If utilizing 1/2" (12.7mm) cannulas in deep laboratory vessels, introduce at a 45° angle to avoid contact with vessel sidewalls.
Stoichiometric supply planning, sequential reconstitution cadence, and itemized consumables BOM for Glutathione.
Do NOT reconstitute all 4 vials simultaneously. Reconstitute one vial at a time as the active protocol requires. Once reconstituted with Bacteriostatic Water USP, a vial maintains stability for 28 days at +2°C to +8°C. Remaining unopened vials should be preserved in solid lyophilized cake form at -20°C to prevent hydrolysis and oxidation.
| Week | Study / Assay Phase | Weekly Target Dose | Syringe Draw (U-100) | Active Vial # | Cumulative Active Mass |
|---|---|---|---|---|---|
| Week 1 | Phase 1: Initial Calibration (Weeks 1–2) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #1(200mg rem) | 100.0 mg / 1014.0 mg |
| Week 2 | Phase 1: Initial Calibration (Weeks 1–2) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #1(100mg rem) | 200.0 mg / 1014.0 mg |
| Week 3 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #1(0mg rem) | 300.0 mg / 1014.0 mg |
| Week 4 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #2(200mg rem) | 400.0 mg / 1014.0 mg |
| Week 5 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #2(100mg rem) | 500.0 mg / 1014.0 mg |
| Week 6 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #2(0mg rem) | 600.0 mg / 1014.0 mg |
| Week 7 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #3(200mg rem) | 700.0 mg / 1014.0 mg |
| Week 8 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #3(100mg rem) | 800.0 mg / 1014.0 mg |
| Week 9 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #3(0mg rem) | 900.0 mg / 1014.0 mg |
| Week 10 | Phase 2: Target Antioxidant Support (Weeks 3–10) | 100.0 mg | 33.3 Units(0.33 mL) | Vial #4(200mg rem) | 1000.0 mg / 1014.0 mg |
| Week 11 | Phase 3: Washout (Weeks 11–12) | 1.0 mg(7x/wk) | 0.3 Units(0.00 mL) | Vial #4(193mg rem) | 1007.0 mg / 1014.0 mg |
| Week 12 | Phase 3: Washout (Weeks 11–12) | 1.0 mg(7x/wk) | 0.3 Units(0.00 mL) | Vial #4(186mg rem) | 1014.0 mg / 1014.0 mg |
Study duration: 6 to 12 Weeks · Washout: 4 Weeks
| Period / Phase | Target Amount | Frequency | Notes & Calibration |
|---|---|---|---|
| Weeks 1–2Starting Baseline | 100 mg | 1x Weekly | Phase 1: Initial Calibration: Hepatic phase II conjugation upregulation, intracellular reactive electrophile neutralization, and GSH/GSSG ratio recovery (50.0 units (0.50 mL) on U-100 syringe at 200.0 mg/mL concentration) |
| Weeks 3–10 | 100 mg | 2x Weekly (e.g., Mon / Thu) | Phase 2: Target Antioxidant Support: Mitochondrial lipid peroxidation suppression and cellular detox pathway optimization (50.0 units (0.50 mL) on U-100 syringe per administration) |
| Weeks 11–12 | Observation Period | Zero dosing | Phase 3: Washout: Endogenous glutathione peroxidase (GPx) and reductase equilibrium observation (4-week rest period) |
4-phase stability timeline, RP-HPLC degradation benchmarks, and storage SOPs for Glutathione
Operating Window: +2°C to +8°C (36°F to 46°F)
Active working solution dissolved in Bacteriostatic Water USP (0.9% Benzyl Alcohol).
| Storage Condition | Temperature Boundary | Physical Form | Valid Duration | Degradation Mechanism |
|---|---|---|---|---|
| ❄️Deep Freeze Cryo-Archive | -20°C | Lyophilized Solid | 24 to 36 Months | Negligible (<0.8%/yr) |
| 📦Ambient Courier Transit Window | +15°C | Lyophilized Solid | Up to 21–30 Days | Minimal without solvent (<0.5%) |
| 💧Reconstituted Refrigerated Storage (2°C–8°C) | +2°C | Reconstituted Solution | 28 to 35 Days | Gradual deamidation >28 days |
| 🚫Critical Degradation Thresholds | >37°C | Degradation Hazard | Immediate Degradation Hazard | Rapid peptide cleavage & aggregation |
Introduce 3.0 mL diluent slowly down the glass wall. Swirl gently horizontally for 45 seconds until powder dissolves into a transparent aqueous state. Do not shake violently.
Glutathione displays an estimated half-life of ~10–15 Minutes (Rapid intracellular sequestration; tissue protective effects persist for several days). Typical study protocols run for 6 to 12 Weeks followed by a washout period of 4 Weeks.
High-purity lyophilized laboratory reference formulation with certified Certificate of Analysis (COA).
Standard Lyophilized Monograph
Tripeptide (gamma-L-Glutamyl-L-Cysteinylglycine) Intracellular Antioxidant Standard
Store desiccated at -20°C upon receipt. Reconstitute strictly in a certified laminar airflow hood utilizing sterile disposable instruments. Avoid direct exposure to UV or fluorescent radiation.
| Net Active Mass | Target Solvent | Diluent Volume | Resulting Concentration | Syringe Graduation Scale |
|---|---|---|---|---|
| 600 mg Lyophilized Cake | Bacteriostatic Water USP (0.9% Benzyl Alcohol) | 3.0 mL | 200.00 mg/mL | 1 Unit = 2000.0 mcg (0.01 mL) |
Swab vial septum with sterile 70% IPA pad. Inspect cake for vacuum seal integrity.
Introduce 3.0 mL solvent slowly down inner glass wall. Never spray directly on cake.
Swirl gently in horizontal circles until fully dissolved. Never shake or invert aggressively.
Rest at +2°C to +8°C for 10 minutes until solution is crystal clear before drawing.
| Phase | Target Active Dose | U-100 Syringe Graduation | Cadence & Pharmacological Purpose |
|---|---|---|---|
| Days 1–7 (Priming) | 100.0 mg | 50.0 Units (0.500 mL) | Initial receptor priming; evaluate baseline physiological tolerance. |
| Weeks 2–4 (Saturation) | 150.0 mg | 75.0 Units (0.750 mL) | Target assay maintenance; peak neurotrophic / metabolic response. |
| Weeks 5–6 (Taper & Washout) | 100.0 mg | 50.0 Units (0.500 mL) | Receptor consolidation prior to mandatory 4-week washout cycle. |
RP-HPLC / LC-MS In-Vitro Assay
Purity Spec: ≥ 98.0% Area
Research Use Only (RUO)
NOT EVALUATED OR APPROVED BY FDA