How we scored it
Botanical root extract, extraction only, no synthetic step = 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
Extracted from Polygonum cuspidatum root using water, ethanol or glycol as solvent, often standardised for resveratrol content. No synthetic modification is involved.
In plain English
An antioxidant extract from the root of Japanese knotweed, a plant long used in traditional preparations. It's added to skincare to help protect the formula and skin from oxidative stress. It is a whole-plant extract with no synthetic modification.
CosIng definition: Polygonum Cuspidatum Root Extract is an extract of the roots of the Japanese Knotweed, Polygonum cuspidatum, Polygonaceae
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.
- 2POLYGONUM CUSPIDATUM ROOT EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3POLYGONUM CUSPIDATUM ROOT EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=POLYGONUM%20CUSPIDATUM%20ROOT%20EXTRACT