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The Peptide Atlas

Glutathione

A three-amino-acid peptide your cells make themselves, and the body's main antioxidant.

Class
Endogenous tripeptide antioxidant
Evidence
Human-tested
Status
Available as a supplement; also compounded as an injection with a prescription.
Forms
Oral, liposomal, injection, IV

What people use it for

Skin brightening, liver support, and the oxidative wear of aging.

The signal

Every cell uses glutathione to neutralize the reactive byproducts of normal metabolism and to process toxins. Levels decline with age, and older adults with low glutathione show measurably higher oxidative stress [1].

How it works

It donates electrons to neutralize reactive molecules before they damage proteins, membranes, and DNA, then gets recycled and used again. The liver runs especially heavily on it, which is why it's central to how the body clears alcohol and medications.

What the research shows

Randomized trials show supplementation can raise the body's stores: six months of oral glutathione increased levels in blood cells [2], and liposomal forms showed similar results with markers of immune function moving alongside [3]. Work in older adults suggests restoring glutathione improves markers of oxidative stress [1]. Trials tying supplementation to how people feel day to day are still thin.

What people get wrong

That all forms are equal. Plain oral glutathione was long thought useless because the gut breaks it down; the trials above suggest stores do rise with sustained use, but form and route still change how much gets where. And that it's only a "detox" molecule: the antioxidant role in normal metabolism is the main job.

Pepvio prescribes this through licensed U.S. physicians and pharmacies. Pepvio's glutathione protocol

References

  1. Kumar P et al., J Gerontol A Biol Sci Med Sci (2023). Supplementing Glycine and N-Acetylcysteine (GlyNAC) in Older Adults Improves Glutathione Deficiency, Oxidative Stress, Mitochondrial Dysfunction, Inflammation, Physical Function, and Aging Hallmarks. PubMed
  2. Richie JP et al., Eur J Nutr (2015). Randomized controlled trial of oral glutathione supplementation on body stores of glutathione. PubMed
  3. Sinha R et al., Eur J Clin Nutr (2018). Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function. PubMed

Last reviewed 2026-08-24. Every reference is verified against the primary literature at review time. How the Atlas grades evidence