INCI · plant-extract · CIR review pending · used in 9 products
Polygonum Cuspidatum Root Extract
Polygonum Cuspidatum Root Extract is derived from the roots of Japanese knotweed (Polygonum cuspidatum), a plant belonging to the Polygonaceae family. It is used in cosmetic formulations as an antioxidant ingredient. The extract appears across a wide range of product types including serums, toners, moisturizers, and eye treatments.
Evidence level
weakEWG score
—Comedogenic
—Category
plant-extract● Benefits
The source identifies this ingredient's primary function as an antioxidant, suggesting it helps protect the skin from oxidative stress. No additional specific skin benefits are described in the source beyond this antioxidant role.
antioxidant
● Cautions
