Ergothioneine ●
TL;DR. This ingredient functions primarily as an antioxidant active and skin-conditioning agent. It is used to help manage oxidative stress in skin-focused formulas, especially serums, moisturizers, and eye products.
What does Ergothioneine do in a cosmetic formula?
This ingredient functions primarily as an antioxidant active and skin-conditioning agent. It is used to help manage oxidative stress in skin-focused formulas, especially serums, moisturizers, and eye products.
Is Ergothioneine clean?
This ingredient is generally well regarded in clean-beauty frameworks because it has low irritation potential and is not a common fragrance allergen or restricted-list concern. The main diligence point is supplier documentation around source, purity, and residual processing materials.
Is Ergothioneine sustainable?
This material occurs in nature, especially in fungi and some microorganisms, and commercial grades may come from fermentation or synthesis. Fermentation from renewable sugar feedstocks is the stronger sustainability profile, while biodegradability is expected for this type of small amino-acid-derived molecule.
Is Ergothioneine COSMOS-approved?
It can align with COSMOS-natural when made through permitted natural extraction or accepted fermentation routes, but the finished grade needs supplier-level confirmation. From a Green Chemistry view, renewable fermentation feedstocks, water-compatible processing, and low use levels support a favorable profile.
How does Ergothioneine work chemically?
The molecule is a sulfur-containing amino-acid derivative with a thione-thiol tautomer system that helps stabilize reactive oxygen species and coordinate certain metal ions. It is typically used at low active levels in leave-on skin care, is water soluble, and is best formulated in aqueous phases with attention to supplier guidance on pH and heat exposure.
Last updated 2026-05-13