L-Glutathione ●
TL;DR. This ingredient functions mainly as an antioxidant and skin-conditioning reducing agent. In cosmetic formulas, it is often used to support brightening claims and help manage oxidative discoloration in both the product and the skin surface.
What does L-Glutathione do in a cosmetic formula?
This ingredient functions mainly as an antioxidant and skin-conditioning reducing agent. In cosmetic formulas, it is often used to support brightening claims and help manage oxidative discoloration in both the product and the skin surface.
Is L-Glutathione clean?
From a clean beauty perspective, it is generally well tolerated, not a common allergen, and not a typical restricted-list ingredient. The main formulation caveat is stability, since it can oxidize in water-based systems if the formula is not well protected.
Is L-Glutathione sustainable?
This material is commonly produced by fermentation using sugar-based feedstocks, which can align well with renewable sourcing. As a small peptide-like molecule, it is expected to be biodegradable and is not associated with environmental persistence concerns.
Is L-Glutathione COSMOS-approved?
It can fit COSMOS-natural alignment when made by permitted fermentation or biotechnology routes using compliant feedstocks and processing aids. Its Green Chemistry profile is favorable because it can be fermentation-derived, water-compatible, biodegradable, and effective at low use levels.
How does L-Glutathione work chemically?
The molecule is a sulfur-containing tripeptide with a reactive thiol group that donates reducing capacity and can convert to an oxidized disulfide form. Typical cosmetic use is often around 0.1% to 2%, with better stability in oxygen-limited, metal-controlled, opaque packaging and mildly acidic to near-neutral pH systems.
Last updated 2026-05-13