How we scored it
Plant extract: all constituents derive from plant biomass (n=1); extraction solvent leaves no mass. 1.00 / 1.00 = 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
Harvested Lactuca virosa leaves are extracted with water, ethanol or glycerin-type solvents, then filtered. No synthetic route exists; a carrier such as propylene glycol is a separate INCI line and is not scored here.
In plain English
A skin-conditioning ingredient made by extracting the leaves of wild lettuce (Lactuca virosa), a plant in the daisy family. It is a mixture of many plant compounds rather than a single chemical, so its exact makeup depends on the solvent and supplier.
CosIng definition: Lactuca Virosa Leaf Extract is an extract of the leaves of the Poison Lettuce, Lactuca virosa L., 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.
- 2LACTUCA VIROSA LEAF EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3LACTUCA VIROSA LEAF EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=LACTUCA%20VIROSA%20LEAF%20EXTRACT