Tremellastin
A cosmetic ingredient used as antioxidant, colorant, hair conditioning in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Tremellastin is the polysaccharide derived from the fungus, Tremella mesenterica.
What does it do?
Tremellastin is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Antioxidant
neutralises free radicals to slow oxidative damage to the formulation or skin
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Colorant
imparts colour to a cosmetic product
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Hair conditioning
improves the appearance, feel, and manageability of hair
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Skin protecting
helps shield skin from external environmental factors
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Skin conditioning - miscellaneous
improves skin condition through mechanisms not classified under the more specific emollient or humectant subcategories
EU regulatory status
Tremellastin is allowed for use in cosmetic products in the European Union under Regulation 1223/2009. It is not subject to a specific Annex restriction at the time of writing.
Frequently asked questions
What is Tremellastin?
Tremellastin is a cosmetic ingredient catalogued in the EU CosIng database. Tremellastin is the polysaccharide derived from the fungus, Tremella mesenterica.
Is Tremellastin allowed in cosmetics in the EU?
Yes. Tremellastin is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Tremellastin do in cosmetic products?
Tremellastin is declared in the EU cosmetic ingredient inventory with these functions: antioxidant, colorant, hair conditioning, skin protecting, skin conditioning - miscellaneous.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 07/05/2026