How we scored it
Extract of cultured Hibiscus rosa-sinensis leaf cells: cell biomass components (sugars, proteins, lipids, metabolites) all n=1; culture-medium plant-growth regulators are reagents leaving no mass. 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 route is plant cell culture, where hibiscus leaf cells are grown in a sterile sugar-and-mineral medium, then harvested and extracted. The alternative of extracting field-grown leaves would be a different INCI ingredient.
In plain English
An extract made from hibiscus leaf cells grown in a laboratory culture instead of being harvested from plants in a field. The cells are grown on a nutrient medium, then extracted and filtered. It is used as a plant-derived additive in skincare products.
CosIng definition: Hibiscus Rosa-Sinensis Leaf Cell Extract is the extract of a culture of the leaf cells of Hibiscus rosa-sinensis, Malvaceae
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.
- 2HIBISCUS ROSA-SINENSIS LEAF CELL EXTRACT. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3HIBISCUS ROSA-SINENSIS LEAF CELL EXTRACT. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=HIBISCUS%20ROSA-SINENSIS%20LEAF%20CELL%20EXTRACT