How we scored it
Botanical leaf extract: all mass is plant-derived (n = 1). Extraction solvent leaves no counted mass. Natural mass 100% of total, NOI = 1.0.
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 the dried leaf of coltsfoot, extracted with water, ethanol or a glycol/glycerin mixture and concentrated. No synthetic route exists; carriers such as glycols, if used, are declared separately on the label.
In plain English
An extract of the leaves of coltsfoot (Tussilago farfara), a daisy-family plant of Europe and Asia, used as an astringent, emollient and skin conditioner. The leaves are extracted with water, alcohol or glycol and concentrated.
CosIng definition: Tussilago Farfara Leaf Extract is an extract of the leaves of the Coltsfoot, Tussilago farfara 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.
- 2TUSSILAGO FARFARA LEAF EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3TUSSILAGO FARFARA LEAF EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=TUSSILAGO%20FARFARA%20LEAF%20EXTRACT