How we scored it
Botanical extract: every extracted constituent is plant-derived (n = 1); extraction solvent leaves no counted mass. Natural mass / total mass = 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 feedstock is wild-harvested or cultivated field horsetail herb from Europe and Asia, extracted with water, ethanol or glycol/glycerin solvents. No synthetic route exists for the extract; any carrier solvent is declared as a separate INCI line.
In plain English
An extract of the green shoots of field horsetail (Equisetum arvense), a silica-rich plant found across Europe and Asia. It is used in skin-care products as an astringent, emollient and skin-conditioning ingredient. It is made by soaking the dried plant in water, alcohol or a similar solvent.
CosIng definition: Equisetum Arvense Leaf Extract is an extract of the leaves of the Horsetail, Equisetum arvense L., Equisetaceae
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.
- 2EQUISETUM ARVENSE LEAF EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3EQUISETUM ARVENSE LEAF EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=EQUISETUM%20ARVENSE%20LEAF%20EXTRACT