Glutathione
Also known as: GSH, L-Glutathione
Glutathione is the body's master antioxidant, a tripeptide composed of glutamate, cysteine, and glycine that protects cells from oxidative damage and supports detoxification processes. This naturally occurring compound plays critical roles in immune function, cellular repair, and neutralizing free radicals throughout the body.
Glutathione is a 307.32 g/mol research peptide. Glutathione is the body's master antioxidant, a tripeptide composed of glutamate, cysteine, and glycine that protects cells from oxidative damage and supports detoxification processes. This naturally occurring compound plays critical roles in immune function, cellular repair, and neutralizing free radicals throughout the body.
Also called: GSH, L-Glutathione
307.32 g/mol
Molecular Weight
Daltons
3
Strong Evidence
benefits
4
Studies Cited
peer-reviewed
250-500
Typical Dose
mg
Overview
Glutathione represents one of the most important antioxidant systems in human physiology, functioning as a cofactor for glutathione peroxidase enzymes that neutralize hydrogen peroxide and lipid peroxides. The molecule exists in both reduced (GSH) and oxidized (GSSG) forms, with the GSH/GSSG ratio serving as a key indicator of cellular redox status. Glutathione levels naturally decline with age, illness, and environmental toxin exposure, leading researchers to investigate supplemental forms including oral, intravenous, and liposomal preparations. The compound supports Phase II detoxification in the liver, helps regenerate other antioxidants like vitamins C and E, and maintains the structural integrity of proteins through its sulfur-containing cysteine residue. Research applications span neurodegenerative diseases, cardiovascular health, immune system support, and anti-aging protocols.
Key Takeaways: Glutathione
- Strongest evidence supports Glutathione for cellular antioxidant protection and liver detoxification support
- Research doses typically range from 250 to 500 mg via oral
- 3 benefits with strong evidence, 3 moderate, 1 preliminary
- Half-life: 15-30 minutes (IV administration)
- 4 cited research studies in this guide
Mechanism of Action
Glutathione functions primarily through direct free radical scavenging and as a cofactor for glutathione peroxidase enzymes. The reduced form (GSH) donates electrons to neutralize reactive oxygen species, becoming oxidized to GSSG in the process. Glutathione reductase then regenerates GSH using NADPH as an electron donor. The compound also conjugates with toxins and heavy metals through glutathione S-transferase enzymes, facilitating their elimination. Additionally, glutathione maintains protein sulfhydryl groups in their reduced state and supports the regeneration of vitamins C and E from their oxidized forms.
Research Benefits
Glutathione at a Glance
Glutathione functions primarily through direct free radical scavenging and as a cofactor for glutathione peroxidase enzymes.
Cellular Antioxidant Protection
Strong EvidenceGlutathione directly neutralizes hydrogen peroxide, hydroxyl radicals, and lipid peroxides while regenerating other antioxidants like vitamin C and E. This comprehensive protection prevents oxidative damage to DNA, proteins, and cellular membranes.
Liver Detoxification Support
Strong EvidenceThe compound serves as the primary cofactor for Phase II detoxification enzymes, conjugating with toxins, heavy metals, and xenobiotics to facilitate their elimination through bile and urine. Glutathione levels correlate strongly with liver function capacity.
Immune System Enhancement
Strong EvidenceGlutathione supports T-lymphocyte function and natural killer cell activity by maintaining optimal redox balance within immune cells. Deficiency impairs both innate and adaptive immune responses.
Neurological Protection
Moderate EvidenceThe antioxidant protects neurons from oxidative stress and supports mitochondrial function in brain tissue. Research shows reduced glutathione levels in neurodegenerative conditions like Parkinson's disease and Alzheimer's disease.
Cardiovascular Health Support
Moderate EvidenceGlutathione prevents LDL cholesterol oxidation and supports endothelial function by maintaining nitric oxide bioavailability. Higher levels associate with reduced cardiovascular disease risk markers.
Skin Health and Anti-Aging
Moderate EvidenceThe compound protects skin cells from UV damage and supports collagen synthesis by preventing oxidative degradation. Some studies suggest glutathione may reduce melanin production, leading to skin lightening effects.
Exercise Recovery Enhancement
PreliminarySupplementation may reduce exercise-induced oxidative stress and support faster recovery by neutralizing reactive oxygen species generated during intense physical activity.
Research Dosing Protocols
Research Purposes Only: All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
| Research Protocol | Dose Range | Route |
|---|---|---|
| General antioxidant support | 250–500 mg | oral |
| Detoxification protocols | 600–1200 mg | IV |
| Neurological research | 1400–2800 mg | IV |
Frequency
Daily to 3 times weekly depending on application
Timing
Empty stomach for oral; any time for IV administration
Cycle Length
Continuous use studied; periodic breaks recommended for high-dose protocols
Research Notes
- 1Oral bioavailability remains low despite various formulation attempts
- 2Liposomal preparations may offer improved absorption compared to standard oral forms
- 3IV administration provides direct systemic availability but requires medical supervision
- 4N-acetylcysteine supplementation may support endogenous glutathione production
Reconstitution Guide
Standard Reconstitution
Vial Size
600 mg
Bacteriostatic Water
2 mL
Concentration
3000 mcg
per 0.1 mL (10 units)
Step-by-Step Guide
Gather Materials
Glutathione vial, bacteriostatic water, alcohol swabs, insulin syringes.
Equilibrate Temperature
Remove the vial from storage and allow it to reach room temperature (5-10 minutes).
Sanitize
Swab the rubber stopper of both the peptide vial and bacteriostatic water vial with alcohol.
Draw Water
Draw 2 mL of bacteriostatic water into a syringe.
Add Water to Vial
Insert the needle into the peptide vial and direct the water stream against the glass wall — not directly onto the powder.
Mix Gently
Swirl the vial gently until the powder is fully dissolved. Never shake. The solution should be clear and colorless.
Store Properly
Refrigerate at 2-8°C refrigerated. 24-48 hours once reconstituted.
Storage Temperature
2-8°C refrigerated
Shelf Life
24-48 hours once reconstituted
Important Notes
- •Glutathione is highly unstable in solution and degrades rapidly
- •Use sterile bacteriostatic water for injection
- •Protect from light during storage and administration
- •Some formulations include stabilizing agents to extend shelf life
Glutathione Dosing Calculator
Calculate daily intake, cycle totals, and vials needed with pre-filled protocols →
Glutathione Reconstitution Calculator
Calculate concentration, syringe units, and doses per vial with auto-filled values →
Safety & Side Effects
Reported Side Effects
- !Gastrointestinal upset (nausea, cramping, diarrhea)
- !Allergic reactions (rare but potentially severe)
- !Skin rash or hives
- !Bronchospasm in asthmatic individuals (inhaled forms)
- !Zinc deficiency with long-term high-dose use
- !Headache and fatigue (typically mild)
- !Injection site reactions (IV/IM administration)
- !Temporary skin lightening (controversial effect)
Potential Interactions
- ⚡Acetaminophen: May deplete glutathione stores, requiring higher doses
- ⚡Chemotherapy agents: Could potentially interfere with some cancer treatments
- ⚡Alcohol: Chronic consumption depletes glutathione levels
- ⚡N-acetylcysteine: Synergistic effects on glutathione production
- ⚡Vitamin C: Mutually supportive antioxidant regeneration
Important: Side effects and interactions listed here are compiled from published research and community reports. This is not a complete list. No formal drug interaction studies have been conducted for most research peptides. Always consult a qualified healthcare provider.
Research Studies
The following studies are referenced in this profile. PubMed IDs are provided where available for independent verification.
Glutathione in health and disease: pharmacotherapeutic issues
Comprehensive review of glutathione's physiological roles and therapeutic potential across various disease states.
Reduced intravenous glutathione in the treatment of early Parkinson's disease
Clinical trial showing improvements in Parkinson's disease symptoms with IV glutathione administration.
Effect of glutathione supplementation on athletic performance
Research examining glutathione's impact on exercise performance and recovery in trained athletes.
Oral glutathione supplementation and glutathione body stores
Study demonstrating limited bioavailability of oral glutathione supplementation in healthy subjects.
Note: This is not an exhaustive list of all published research. Studies are selected for relevance and quality. Click PubMed IDs to verify sources independently. Inclusion does not imply endorsement of the peptide for any clinical use.
Frequently Asked Questions
Liposomal glutathione offers better absorption than standard oral forms, while IV administration provides the highest bioavailability. N-acetylcysteine supplementation may be more cost-effective for supporting endogenous glutathione production.
IV glutathione effects may be noticed within hours to days, while oral forms typically require 2-4 weeks of consistent use to show measurable benefits. Individual response varies based on baseline levels and health status.
Glutathione generally combines well with other antioxidants like vitamin C, vitamin E, and selenium. N-acetylcysteine can support glutathione production, while alpha-lipoic acid helps regenerate glutathione from its oxidized form.
Some research suggests high-dose glutathione may inhibit melanin production, leading to skin lightening effects. However, this remains controversial and is not approved for cosmetic purposes in many countries.
Age, chronic illness, oxidative stress, alcohol consumption, acetaminophen use, heavy metal exposure, and certain medications can all deplete glutathione levels. Poor diet and lack of sleep also contribute to depletion.
Glutathione appears safe for most people when used appropriately. However, long-term high-dose supplementation should be monitored by healthcare providers, particularly when using IV forms or in individuals with underlying health conditions.
Glutathione may help process alcohol metabolites more efficiently and reduce oxidative stress from drinking. However, the best approach for hangovers remains moderation and proper hydration.
Spinach, asparagus, avocados, broccoli, and fresh meats contain glutathione, but cooking and processing significantly reduce levels. Supporting the body's natural production through precursor nutrients may be more effective.
Research & Educational Use Only
All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
The information presented here is compiled from published research studies and is intended for informational purposes only. Individual results may vary. Always consult with a licensed healthcare provider.