The ingredient narratives reshaping clean beauty.
Glutathione
aka gamma-glutamylcysteinylglycine · GSH · reduced glutathione · l-glutathione
Endogenous tripeptide antioxidant gaining traction in K-beauty brightening serums and reformulated hyperpigmentation products. Topical application for skin brightening is mechanistically plausible but evidence quality is moderate.
- Antioxidant — direct ROS scavenging and regeneration of vitamins C and E
- Inhibits tyrosinase activity (melanogenesis inhibition)
- Anti-inflammatory via NF-κB modulation
- Endogenous skin detoxification pathway support
- Reduces UV-induced oxidative stress
- Brightening serums
- Anti-hyperpigmentation formulas
- Antioxidant cocktail serums
- Under-eye brightening products
- Clarifying toners
Highly water-soluble; pH stable in slightly acidic to neutral range. Oxidises readily — encapsulation (liposomal) or reduced-form stabilisation required for shelf stability. Pairs well with vitamin C (mutual antioxidant regeneration).
Skin penetration of the intact glutathione tripeptide through intact stratum corneum is limited. Most topical activity is likely to occur at the skin surface or in upper stratum corneum layers. The oral glutathione literature (better-studied) is not directly translatable to topical use.
Gaining acceptance in clean K-beauty as a brightening active. Associated with skin-tone-evenness claims rather than the controversial 'skin whitening' language common in oral glutathione marketing in Asia.
The ingredient narratives reshaping clean beauty.
Glutathione
aka gamma-glutamylcysteinylglycine · GSH · reduced glutathione · l-glutathione
Endogenous tripeptide antioxidant gaining traction in K-beauty brightening serums and reformulated hyperpigmentation products. Topical application for skin brightening is mechanistically plausible but evidence quality is moderate.
- Antioxidant — direct ROS scavenging and regeneration of vitamins C and E
- Inhibits tyrosinase activity (melanogenesis inhibition)
- Anti-inflammatory via NF-κB modulation
- Endogenous skin detoxification pathway support
- Reduces UV-induced oxidative stress
- Brightening serums
- Anti-hyperpigmentation formulas
- Antioxidant cocktail serums
- Under-eye brightening products
- Clarifying toners
Highly water-soluble; pH stable in slightly acidic to neutral range. Oxidises readily — encapsulation (liposomal) or reduced-form stabilisation required for shelf stability. Pairs well with vitamin C (mutual antioxidant regeneration).
Skin penetration of the intact glutathione tripeptide through intact stratum corneum is limited. Most topical activity is likely to occur at the skin surface or in upper stratum corneum layers. The oral glutathione literature (better-studied) is not directly translatable to topical use.
Gaining acceptance in clean K-beauty as a brightening active. Associated with skin-tone-evenness claims rather than the controversial 'skin whitening' language common in oral glutathione marketing in Asia.