Unique thiol antioxidant; produced by certain mushrooms and bacteria; not synthesised by humans (diet-derived); high affinity for skin, transporter (ETT) expressed in skin; clinical evidence for UV damage protection and skin brightening accumulating; very low sensitization risk; premium ingredient
Function & Common Use
Active (antioxidant)
Active Ingredient
Serums antioxidant products premium moisturisers
Biotechnological (fungal fermentation)
Concentration Limits
No limit
No limit
No specific 21 CFR cosmetic limit identified in source checked
No specific MFDS limit identified in source checked; verify if ingredient is used in a Korean functional cosmetic category
Pregnancy: No specific restriction identified in source checked; standard cosmetic use
Frequently Asked Questions
Is Ergothioneine safe to use in skincare?
Ergothioneine has a Low concern rating from The Clean Sheet. Unique thiol antioxidant; produced by certain mushrooms and bacteria; not synthesised by humans (diet-derived); high affinity for skin, transporter (ETT) expressed in skin; clinical evidence for UV damage protection and skin brightening accumulating; very low sensitization risk; premium ingredient
Is Ergothioneine allowed in India?
Ergothioneine is currently classified as "Permitted" under Indian cosmetics regulations. No concentration limit is specified for India.
What is Ergothioneine used for in cosmetics?
Ergothioneine functions as: Active (antioxidant). It is commonly found in: Serums antioxidant products premium moisturisers.
Regulatory Status
Identifiers
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