Glutathione - High Quality

Name:  Lynn
Wechat：  15914422644

Tel：+86  15914422644

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Email：    guangsheng 5   @zgguangsheng.com

1. Core Molecular & Physicochemical Specifications

2. Mechanism of Action

1. Antioxidant Defense
   
   
   • Directly scavenges reactive oxygen species (ROS) and reactive nitrogen species (RNS) (e.g., superoxide anion, hydroxyl radical, peroxynitrite), converting them into harmless products.
   • Regenerates other antioxidants (e.g., vitamin C, vitamin E, coenzyme Q10) from their oxidized forms, maintaining the body’s antioxidant network.
   • Maintains the reduced state of protein thiol groups, preventing protein denaturation and aggregation caused by oxidative stress.
   
   
2. Detoxification Function
   
   
   • Conjugates with endogenous/exogenous toxins (e.g., heavy metals, drugs, environmental pollutants) via glutathione S-transferase (GST), forming water-soluble metabolites that are excreted through the liver and kidneys.
   • Facilitates the metabolism of xenobiotics and carcinogens, reducing their damage to cells.
   
   
3. Redox Regulation & Cellular Signaling
   
   
   • Modulates the GSH/GSSG ratio to regulate intracellular signaling pathways (e.g., NF-κB, Nrf2), affecting cell proliferation, apoptosis, and immune response.
   • Nrf2 pathway activation upregulates the expression of antioxidant and detoxification enzymes (e.g., HO-1, GST), enhancing cellular stress resistance.
   
   
4. Immune Modulation
   
   
   • Promotes lymphocyte proliferation and cytokine secretion (e.g., IL-2, IFN-γ), enhancing the activity of natural killer (NK) cells and macrophages.
   • Protects immune cells from oxidative damage, maintaining immune system function.
   
   

3. Biological Functions & Applications

3.1 Core Physiological Effects

• Anti-Oxidative Stress: Alleviates oxidative damage in tissues such as the liver, brain, and lungs; reduces oxidative stress in chronic diseases (e.g., diabetes, cardiovascular disease).
• Liver Protection: Detoxifies liver toxins (e.g., alcohol metabolites, drug-induced liver injury); aids in the treatment of hepatitis, cirrhosis, and fatty liver disease.
• Skin Health: Inhibits melanin synthesis by reducing tyrosinase activity; lightens skin pigmentation, improves skin elasticity, and delays skin aging.
• Immune Enhancement: Boosts immunity in immunocompromised populations (e.g., the elderly, post-chemotherapy patients).
• Neuroprotection: Reduces oxidative damage in the brain; mitigates neurodegenerative changes in Alzheimer’s, Parkinson’s, and stroke models.

3.2 Application Fields

4. Production & Quality Control

4.1 Manufacturing Processes

1. Chemical Synthesis
   
   
   • Assembles the tripeptide via solid-phase peptide synthesis (SPPS); low yield, high cost, and potential for racemic mixtures (D-form impurities).
   • Suitable for producing small quantities of high-purity GSH for research use.
   
   
2. Enzymatic Synthesis
   
   
   • Uses glutamylcysteine synthetase (GCS) and glutathione synthetase (GS) to catalyze the reaction of glutamic acid, cysteine, and glycine; high specificity, low impurity content.
   • Industrial production mainstream; compatible with large-scale manufacturing.
   
   
3. Microbial Fermentation
   
   
   • Uses engineered strains (e.g., Saccharomyces cerevisiae, Escherichia coli) to synthesize GSH intracellularly; high yield, low cost, and natural L-form configuration.
   • Dominant method for commercial GSH production (food and pharmaceutical grades).
   
   

4.2 Quality Testing Standards

5. Administration, Safety & Precautions

5.1 Administration Routes & Dosage

• Oral Administration: 200–1000 mg/day for adults; suitable for daily antioxidant supplementation. Low bioavailability (~5–10%) due to degradation by intestinal peptidases.
• Intravenous/Intramuscular Injection: 600–1800 mg/day for clinical treatment (e.g., liver disease); direct delivery to the bloodstream with 100% bioavailability.
• Topical Application: Skincare products containing 0.1–1% GSH; applied directly to the skin for whitening and anti-aging effects.

5.2 Safety Profile

• Low Toxicity: GSH is endogenous, with an LD₅₀ >5 g/kg in rodents. No severe adverse reactions reported in humans at therapeutic doses.
• Common Side Effects: Mild gastrointestinal discomfort (nausea, diarrhea) with high-dose oral administration; transient injection-site pain with parenteral use.
• Contraindications: Hypersensitivity to glutathione or any excipients; caution in patients with sulfite allergies (some formulations contain sulfite stabilizers).
• Drug Interactions: May enhance the efficacy of chemotherapeutic drugs and reduce their toxic side effects; avoid concurrent use with nitroglycerin (may reduce its anti-angina effect).

5.3 Handling Guidelines

• Storage: Reduced GSH should be stored at -20°C in a sealed, light-protected container; avoid repeated freeze-thaw cycles.
• Transport: Cold chain transportation (2–8°C) to prevent oxidation during transit.
• Research Use: Use fresh GSH solutions for in vitro experiments; prepare working solutions immediately before use to avoid oxidation to GSSG.

6. Key Advantages & Limitations

6.1 Advantages

1. Endogenous Origin: No immunogenicity; compatible with human physiological processes.
2. Multi-Functional: Integrates antioxidant, detoxification, immune modulation, and tissue protection effects.
3. Wide Application: Used in pharmaceuticals, cosmetics, nutraceuticals, and scientific research.

6.2 Limitations

1. Low Oral Bioavailability: Degraded by intestinal enzymes; parenteral administration is required for clinical therapeutic effects.
2. Oxidation Instability: Reduced GSH is prone to oxidation, requiring strict storage conditions.
3. Dose-Dependent Efficacy: High doses are needed for significant therapeutic effects, increasing the cost of clinical use.