Glutathione
Glutathione is an endogenous tripeptide studied for redox balance, oxidative stress markers, and detoxification pathways.
What Glutathione is
Glutathione is a three-amino-acid molecule made from glutamate, cysteine, and glycine. It is central to cellular redox buffering, glutathione peroxidase activity, conjugation reactions, and protection against oxidative stress. Although it is technically a peptide, most research treats it as a core antioxidant and metabolic molecule rather than a signaling peptide.
Published work includes oral, liposomal, topical, and parenteral contexts, with outcomes such as blood glutathione pools, oxidative stress biomarkers, immune markers, and tissue-specific endpoints. Research-grade glutathione powder is Research Use Only unless it is part of a regulated product pathway. Literature ranges below are reference values from published studies, not instructions.
How it works
Glutathione cycles between reduced GSH and oxidized GSSG to maintain cellular redox balance. It supports glutathione peroxidase and glutathione S-transferase reactions, helps recycle other antioxidants, and participates in conjugation chemistry used to process electrophiles. Because intracellular synthesis depends heavily on cysteine availability and enzyme regulation, researchers often compare direct glutathione with precursor strategies such as NAC or GlyNAC.
Who works with it, and what they are measuring
Glutathione is studied by biochemists, nutrition scientists, toxicologists, dermatology researchers, and clinical trialists working on oxidative-stress biomarkers. Analytical labs also study sample handling because glutathione measurements are sensitive to oxidation and processing conditions.
What the research examines
These describe where the compound shows up in published work. None of them should be read as an established outcome.
How it appears in the literature
Figures as they appear in the source literature. Context matters more than the number.
| Research context | Reported amount | Frequency | Route |
|---|---|---|---|
| Randomized oral glutathione supplementation study | 250 mg – 1000 mg | daily in study protocol | oral |
| Clinical trial of glutathione supplementation with oral and transdermal arms | 250 mg – 500 mg | daily in study protocol | oral or transdermal |
Handling & storage
Reduced glutathione is commonly protected from heat, moisture, light, and oxidation; reconstituted research solutions are generally refrigerated and used promptly.
Notes on combined research
Glutathione is frequently studied with NAC, glycine, selenium, or mitochondrial markers, but co-interventions can blur whether changes come from direct GSH, precursor availability, diet, or assay handling. Good research designs define the form, route, timing, and redox measurement method before adding other variables.
Glutathione questions
Published oral studies often report 250-1000 mg daily. Those are study values, not recommendations and not instructions for research-grade material.
Research reconstitution depends on vial size and target concentration. A 600 mg or 1200 mg vial can be modeled with several volumes, but the math does not imply human use.
Daily values depend on formulation and research endpoint. Oral, topical, transdermal, and parenteral contexts should not be mixed in one generic answer.
A responsible chart should separate oral supplement studies from lab-grade reconstitution examples and should cite the original research context.
Some blood-pool changes are measured over weeks, while acute redox changes can occur faster in controlled experiments. The endpoint defines the timeline.
A single half-life is not very useful because glutathione is synthesized, oxidized, reduced, exported, and degraded continuously.
It is studied with antioxidant and precursor compounds, but stacked designs need controls. Research Use Only material is not for human consumption.
Read the research yourself
Verified against PubMed, one by one. A reference you cannot open is not evidence.
- Randomized controlled trial of oral glutathione supplementation on body stores of glutathione.PubMed
- A clinical trial of glutathione supplementation in autism spectrum disorders.PubMed
- Randomized Clinical Trial of How Long-Term Glutathione Supplementation Offers Protection from Oxidative Damage and Improves HbA1c in Elderly Type 2 Diabetic Patients.PubMed