How we scored it
Callus cell mass grown in culture; medium nutrients and growth regulators leave no mass in the extract. All atoms come from plant cells: natural 100% / total 100% = 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, in which Silybum marianum callus is grown on a sugar-based medium, harvested and extracted. The alternative of extracting field-grown milk thistle is also natural, so the value does not change.
In plain English
A plant-cell ingredient listed for skin conditioning, softening (emollient) and skin protecting functions. It is made by growing milk thistle cells (callus) in a laboratory culture, then harvesting and extracting them, rather than extracting field-grown plants.
CosIng definition: Silybum Marianum Callus Extract is the extract of the callus of Silybum marianum grown in culture, Asteraceae.
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.
- 2SILYBUM MARIANUM CALLUS EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3SILYBUM MARIANUM CALLUS EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=SILYBUM%20MARIANUM%20CALLUS%20EXTRACT