An endogenous antioxidant that scavenges free radicals, inhibits tyrosinase activity, and reduces melanin synthesis. Provides antioxidant, skin brightening, and anti-aging benefits. Enhances the efficacy of vitamin C-based brightening systems while reducing yellowing associated with pure vitamin C.

0.05%–0.5% (in conventional formulations)

1%–5% (in lyophilized powder systems)

Reduced glutathione is a sulfur-containing bioactive ingredient that is prone to oxidation in aqueous environments, which may result in a characteristic odor. Appropriate fragrance selection is recommended to mask this.

Recommended Final pH Range: 3.5–6.0

It is recommended to store in dry powder form and mix with aqueous solutions immediately before use.