Polygonum aviculare (Knotgrass) extract
AKA “Knotgrass Extract
Extract
Ingredient Facts
Polygonum aviculare (Knotgrass) extract
AKA: Knotgrass Extract
Extract · Antioxidant · EWG: 4
Plant-Derived
Antioxidant
Emollient
Soothing
Skin Conditioner
Extract
Clean
Knotgrass extract is a naturally derived plant ingredient that softens and smooths skin with emollient benefits. Sourced from this European herb, it helps keep skin feeling nourished and conditioned.
Family
Polygonaceae (Buckwheat family)
Plant Part
Herb
Lifeform
Annual or perennial
Climate
Temperate
CAS #
84604-04-6
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Soothing
Calms redness, irritation, and inflammation. Your skin's chill pill — great for sensitive, reactive, or post-procedure skin.
Locks In Moisture
Traditional Use
Used in traditional European and Asian herbal medicine for wound healing and skin astringency; historically applied to support skin firmness and clarity.
Skin Types
all-skin-types
Best For
Redness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: Kew POWO · CosIng · EWG · CIR