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Glutathione peptide: Metabolic / Longevity research guide

In short: Glutathione (GSH) is the body’s principal endogenous antioxidant - a γ-glutamyl-cysteinyl-glycine tripeptide central to redox balance, Phase-II detoxification, and cellular thiol defence. It is studied in preclinical (cell and animal) research and is supplied strictly for laboratory use, not for human or clinical use.

Not medical advice. Glutathione is a research compound. This guide does not provide dosing, diagnosis, therapy recommendations, or claims about effects in humans.

Glutathione at a glance

Compound type

Research peptide

Research category

Metabolic / Longevity

Also known as

Glutathione, GSH, L-Glutathione, reduced glutathione, γ-Glu-Cys-Gly, gamma-glutamylcysteinylglycine, GSH tripeptide

Molecular weight

307.32 Da

Research-grade purity

99.10% HPLC

Evidence context

Preclinical / research use only

Regulatory status

Not an approved medicine. Supplied as a research compound

Last reviewed

26 June 2026

What to know first

Compound Glutathione Research class Metabolic / Longevity Purity 99.10% HPLC Available pack sizes 10 × 600 mg, 10 × 1500 mg Storage Lyophilised powder: store in freezer (−20 °C), protected from light and moisture. Reconstituted: refrigerate 1–6 °C and use promptly - reduced glutathione oxidises to GSSG on exposure to air. Use within the validated stability window for the specific batch.

Details and limits sit in the sections below. Research use only. No unsupported scientific claims are added here.

What Glutathione is

Glutathione (GSH) is a three-amino-acid peptide that serves as the body’s principal antioxidant and a central hub of redox balance, detoxification, and cellular thiol defence.

One-paragraph overview from our research datasheet. Still scientific, but faster to read than the full mechanism list below.

Glutathione (GSH) is the body’s principal endogenous antioxidant - a γ-glutamyl-cysteinyl-glycine tripeptide central to redox balance, Phase-II detoxification, and cellular thiol defence.

Research contexts

Peer-reviewed papers discuss Glutathione in specific lab settings. The points below reflect research questions, not health claims.

Research vs. personal use: Literature describes experiments in cells and animals. That is distinct from real-world use. Our products are for laboratory research only.

Typical study contexts

Mitochondrial stress, NAD+/redox biology and nutrient-sensing pathways.

Enzyme activity, gene expression or endurance-style animal readouts.

The body’s principal endogenous antioxidant and most abundant cellular thiol.

Directly scavenges reactive oxygen species via its reactive cysteine sulfhydryl group.

Electron donor for glutathione peroxidase (GPx) - detoxifies hydrogen peroxide and lipid peroxides.

Forms the GSH/GSSG redox couple that buffers cellular redox state, regenerated by glutathione reductase + NADPH.

Why Metabolic / Longevity research matters

Researchers study these compounds for mitochondrial function and cellular energy stress. Ageing and metabolic disease models are common.

Mechanisms (technical review)

Our datasheet lists mechanistic themes from preclinical work. These are research endpoints, not health claims.

The body’s principal endogenous antioxidant and most abundant cellular thiol

Directly scavenges reactive oxygen species via its reactive cysteine sulfhydryl group

Electron donor for glutathione peroxidase (GPx) - detoxifies hydrogen peroxide and lipid peroxides

Forms the GSH/GSSG redox couple that buffers cellular redox state, regenerated by glutathione reductase + NADPH

Obligatory co-substrate for glutathione S-transferases in Phase-II xenobiotic conjugation / detoxification

Regenerates the oxidised forms of vitamins C and E, extending the antioxidant network

Lab handling & preparation

Storage: Lyophilised powder: store in freezer (−20 °C), protected from light and moisture. Reconstituted: refrigerate 1–6 °C and use promptly - reduced glutathione oxidises to GSSG on exposure to air. Use within the validated stability window for the specific batch.. See the storage guide.

Research dosing context: Literature typically discusses 600–1500 mg per preparation (research-protocol range). Intermittent dosing in published research protocols; intravenous and intramuscular routes are most common Intravenous glutathione has a short plasma half-life (on the order of minutes) due to rapid turnover by γ-glutamyl transferase at the cell surface; oral GSH bioavailability is poor because it is hydrolysed in the gut, which is why injectable and precursor strategies (e.g. NAC) dominate the literature. These figures describe the research context and are not a dosing recommendation. Material is for laboratory research only.

Preparation: Follow the reconstitution guide. Confirm volumes with the calculator.

Purity check: Use the COA reading guide and the published Glutathione Certificate of Analysis.

Common Questions People Are Asking

What is glutathione used for in research?

Glutathione (GSH) is studied as the body’s principal antioxidant and a hub of redox balance and detoxification. Research examines its role in scavenging reactive oxygen species, powering glutathione peroxidase enzymes, buffering the cellular redox state via the GSH/GSSG ratio, supporting Phase-II detoxification, and - separately - its effect on skin pigmentation via tyrosinase.

Why is glutathione called the "master antioxidant"?

Because it is both the most abundant small-molecule antioxidant in the cell and a central node that supports the others - it powers the glutathione peroxidase enzymes that break down peroxides and regenerates the oxidised forms of vitamins C and E, effectively recycling the wider antioxidant network rather than acting alone.

What is the difference between GSH and GSSG?

GSH is reduced (active) glutathione; GSSG is the oxidised form, made of two glutathione molecules joined by a disulfide bond. GSH donates electrons and becomes GSSG; the enzyme glutathione reductase regenerates GSH from GSSG using NADPH. The ratio of the two (normally heavily weighted toward GSH) is a standard laboratory measure of oxidative stress.

Why is glutathione usually injected rather than taken orally?

Oral glutathione is poorly bioavailable because it is largely hydrolysed in the gut before absorption. That is why research protocols favour intravenous or intramuscular routes, or precursor strategies such as N-acetylcysteine (NAC) that help cells make their own glutathione. Note that injected GSH also clears from plasma quickly, within minutes, due to rapid enzymatic turnover.

How should glutathione be stored?

Keep the lyophilised powder frozen at −20 °C, protected from light and moisture. After reconstitution, refrigerate at 1–6 °C and use it promptly - reduced glutathione oxidises to GSSG on exposure to air, so minimise headspace and avoid prolonged storage of the dissolved solution.

Is this page medical advice? Can I use Glutathione for my health?

No, and no. This article is educational only. We do not provide dosing, medical recommendations, or health claims. Our products are sold strictly for laboratory research, not for personal use of any kind.

Where do I find Glutathione specs, purity certificates and pricing?

Open the shop listing via “View product details.” There you will see batch specs, the Certificate of Analysis (COA), concentration, purity grade, and available SKUs with current pricing.

Related peptide guides

Other compounds researchers often read about alongside Glutathione.

MOTS-C: Metabolic / Longevity research guide

5-Amino-1MQ: Metabolic / Longevity research guide

Epitalon: Metabolic / Longevity research guide

FOXO4-DRI: Metabolic / Longevity research guide

SS-31: Metabolic / Longevity research guide

Continue Glutathione research

Analytical evidence, comparisons and current research for this compound. Research use only.

Analytical evidence View the Glutathione COA Current batch purity and identity testing, 2026-06-23. View the COA →

Research area Cognitive & longevity research The neuropeptide and longevity research area - nootropic and geroprotective peptides and related compounds studied in cognition… Explore the research area →

Scientific sources & further reading

Primary literature and registries for Glutathione, plus mainstream coverage of the peptide category. Research use only - not medical advice.

Databases & literature:

PubMed: peer-reviewed literature on Glutathione

ClinicalTrials.gov: registered studies on Glutathione

Glutathione: Wikipedia

Peptides in the news:

WebMD: consumer health reference

BBC News: Health

CNN Health: “Peptides: what to know about the wellness trend”

Sky News: “Can peptides make America healthy again?”

Sky News: “Inside the exploding US peptides craze” (video)

Sky News Australia: “Black market peptide trade explodes as influencers fuel uptick in use”

Sky News Australia: “Backyard peptide boom sparks alarm” (video)

Sky News Australia: “Oprah reveals struggle with shame of weight-loss drugs”

Ready to order? View full product specs

Access concentration, batch info, variants, and current pricing on our shop.

Also known as: Glutathione, GSH, L-Glutathione, reduced glutathione, γ-Glu-Cys-Gly, gamma-glutamylcysteinylglycine, GSH tripeptide

PRECISION. PURITY. PERFORMANCE.

Research peptides at >99% HPLC-verified purity, third-party tested by Janoshik Analytical & Freedom Diagnostics, with Certificates of Analysis published per released batch. Supplied strictly for laboratory research use.

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