Glutathione: The Master Antioxidant — Research Overview

Glutathione is often called the body's master antioxidant — the most abundant antioxidant inside human cells. This overview is for laboratory and educational reference only.

What is glutathione?

Glutathione (GSH) is a tripeptide built from three amino acids — glutamate, cysteine, and glycine. It is found in virtually every cell and is the principal intracellular antioxidant studied in redox biology.

Mechanism

Redox cycling (GSH ↔ GSSG)

Glutathione neutralizes reactive oxygen species by donating an electron, converting from its reduced form (GSH) to an oxidized form (GSSG). Enzymes recycle GSSG back to GSH. The GSH/GSSG ratio is studied as a readout of cellular oxidative stress.

Hepatic detoxification

In the liver, glutathione is studied for its role in phase II conjugation — binding compounds to make them water-soluble for clearance — which is why it is a frequent subject of detoxification research.¹

Why the injectable route is studied

Oral glutathione faces debated bioavailability because digestion breaks the tripeptide down. Research has therefore examined non-oral routes for delivering intact glutathione in laboratory contexts.

Where it fits in longevity research

Glutathione is often studied alongside other cellular-maintenance compounds such as NAD+ (redox coenzyme) and mitochondrial peptides like MOTS-C and SS-31, since oxidative stress and mitochondrial function are interlinked.

Handling and reconstitution

Supplied as a lyophilized powder; reconstitute with bacteriostatic water for laboratory use and refrigerate (2–8°C). See Understanding Peptide Reconstitution and How to Store Research Peptides.

Verified purity

Renova material is third-party tested with a per-batch COA (HPLC purity, identity, test date). See How to Read a Peptide COA and confirm any lot with Verify Your Vial.

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References

1. Lu SC. Glutathione synthesis. Biochim Biophys Acta. 2013;1830(5):3143–3153. ↩