How we scored it
Fermentation product; selenium supplied as a mineral ion is natural counter-species. No petrochemical fragment present. 100% natural.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.
Where it comes from
Produced by fermenting Saccharomyces yeast on a growth medium enriched with selenium salts. The yeast biomass and bound selenium are both natural-origin under ISO 16128.
In plain English
A yeast-derived ingredient made by growing baker's yeast in a selenium-rich broth so the cells absorb and bind the mineral. Used in skincare and haircare to deliver selenium and yeast-fermentation nutrients to skin or scalp.
CosIng definition: Saccharomyces/Selenium Ferment is the product obtained by the fermentation of Saccharomyces in the presence of selenium ions
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2SACCHAROMYCES/SELENIUM FERMENT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3SACCHAROMYCES/SELENIUM FERMENT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=SACCHAROMYCES/SELENIUM%20FERMENT