The Peptide Observer

Peptide research, explained for people who are not scientists.

Quick answer

What is Glutathione?

Built from index records dated 2026-10-09 to 2026-10-13 Compiled by an automated pipeline, checked by The Peptide Observer editorial desk. No qualified clinical reviewer. How this site works

Glutathione is a peptide, grouped on this site under Mitochondrial and longevity-associated peptides, and the 12 research records kept here are 2 from studies in rats or mice and 10 that do not state what kind of study it is.

The literature search returned 188,556 records. This site keeps 12 of them, which is less than one hundredth of one per cent of what came back.

What it is

This site puts it in the Mitochondrial and longevity-associated peptides group.

An endogenous tripeptide thiol; the retrieved records characterise it as the substrate of glutathione S-transferases and glutathione peroxidase and as the principal determinant of the cellular redox environment.[1, 2]

Stated in the titles of the cited 1974 Journal of Biological Chemistry and 2001 Free Radical Biology and Medicine papers.

What kind of records

The records kept here are animal and laboratory studies only.

That sentence is produced by counting, not by reading. What was counted: no interventional human trial record; 2 rodent and 0 in vitro records among 12.

What this does not settle

Where this comes from

The records cited above, in full.

  1. Glutathione S-transferases. The first enzymatic step in mercapturic acid formation. The Journal of biological chemistry (1974). pmid:4436300
  2. Redox environment of the cell as viewed through the redox state of the glutathione disulfide/glutathione couple. Free radical biology & medicine (2001). pmid:11368918