Peptide library · Skin & longevity
Glutathione
The master antioxidant
Supplement3amino acids (glutamate, cysteine, glycine). Your body makes it in every cell
What it is
A small peptide that is your cells' main antioxidant. It neutralizes free radicals and helps the liver clear toxins.
Why researchers are interested
- A 6 month randomized trial found daily supplements raised the body's glutathione stores.
- Central to liver detox pathways.
- Levels tend to fall with age and stress.
Good to know
- Oral absorption is debated, which is why other forms are studied.
- Raising levels hasn't been proven to prevent disease.
Evidence level: 3 of 5
Sources
Richie et al., Eur J Nutr 2015
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Educational content only. Not medical advice. Last reviewed 2026-10-17.