What it does
Its cosmetic potential depends on stability, penetration and formulation.
Antioxidants
Glutathione.
A tripeptide found in biological antioxidant systems and used in some brightening cosmetics.
- INCI name
- Glutathione
- Function
- A reducing agent and antioxidant in the formula.
- Information level
- Emerging evidence
- Last reviewed
- 22 September 2026
Who may benefit
Antioxidant and radiance-focused routines.
Compatibility
Vitamin C, niacinamide and SPF.
Precautions
Topical evidence is still limited and does not justify promises of guaranteed lightening.
How to use it
Morning or evening.
Concentrations
The percentage cannot be inferred from INCI order. WAI LAB shows it only when stated by a verifiable source.
HOW TO READ IT
What it means in the INCI list?
In the European Union, ingredients above 1% are listed in descending order by weight; below 1%, they may appear in any order. Their position therefore cannot be used to calculate an exact percentage.
Its position helps you understand the formula, but does not on its own establish effectiveness or an exact percentage.
SOURCES
Where the information comes from.
WAI LAB distinguishes cosmetic function, regulatory context and scientific literature. This information is not a substitute for medical advice.
FROM UNDERSTANDING TO CHOOSING
Products with Glutathione.
36 catalogue products list a recognised form of this ingredient in their INCI.
36 resultsVerified profiles with declared concentrations appear first.
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Verified![Filorga HYDRA-AOX [5] SERUM](/wai-lab/products/prd00690-filorga.webp)
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Verified24 of 36 shown