How we scored it
Fermentation product: yeast biomass and metabolites assembled from the culture feedstock (assumed glucose or glycerol, n = 1), so 1.0. A methanol-fed culture would add n = 0 carbon; not verified.
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
Pichia pastoris is grown in a fermenter on a sugar or glycerol medium, then the cells or broth are extracted and the extract filtered. Pichia is a methanol-utilising yeast, so a methanol-fed process is possible and the supplier's carbon source should be confirmed.
In plain English
A clear liquid made by growing a yeast, Pichia pastoris, in a fermenter, then extracting the culture and filtering it. Used in skin-care products as an emollient and skin-conditioning ingredient. It comes from the yeast culture and whatever nutrients the yeast was grown on.
CosIng definition: Pichia Ferment Extract Filtrate is a filtrate of an extract of the product obtained through fermentation by the microorganism Pichia pastoris.
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.
- 2PICHIA FERMENT EXTRACT FILTRATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3PICHIA FERMENT EXTRACT FILTRATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PICHIA%20FERMENT%20EXTRACT%20FILTRATE