How we scored it
Plant callus cells grown on a sugar and mineral medium; every atom in the biomass is plant-derived (n = 1). Hormones and solvents leave no mass. 1.0 / 1.0 = 1.00.
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
Dominant route is plant cell culture: Aster yomena callus is grown on a sucrose-based nutrient medium in flasks or bioreactors, then harvested and extracted. No commercially significant alternative route exists; any glycol carrier added by a supplier is declared separately and not counted.
In plain English
A skin-conditioning ingredient from Aster yomena, a daisy-family plant native to East Asia. Rather than harvesting whole plants, the plant's cells are grown in a nutrient bath in a laboratory and then extracted. It is a plant-cell extract, not a synthetic compound.
CosIng definition: Aster Yomena Callus Extract is the extract of the callus of Aster yomena grown in culture.
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.
- 2ASTER YOMENA CALLUS EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3ASTER YOMENA CALLUS EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ASTER%20YOMENA%20CALLUS%20EXTRACT