Polygonum Cuspidatum Root Extract

Polygonum Cuspidatum Root Extract is a botanical ingredient derived from Japanese knotweed. It supports antioxidant activity, helps preserve formula quality, and is used in brightening and anti-aging products to promote a more even, radiant look.
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Ingredient Snapshot

Overview
Japanese knotweed extract that fights free radicals and evens tone.
Category
Antioxidant, Brightening, Anti-aging
Type
Botanical Extract

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Helps defend against free-radical damage and supports a more uniform tone and glow. Complements routines focused on early signs of aging.

Uses In Skincare & Cosmetics

Frequently included in brightening serums, essences, moisturizers, and sunscreens; also used in formulas to help maintain product freshness.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Usually low risk, but mild irritation can occur in sensitive individuals. As with many botanicals, rare allergic reactions are possible; discontinue if redness or itching appears.

Is Polygonum Cuspidatum Root Extract a Good Ingredient?

A well-known source of resveratrol that provides antioxidant support and helps preserve formulas, with generally low irritation potential (Good). Evidence from resveratrol studies supports its role against oxidative stress, though results depend on concentration and vehicle.

Products with Polygonum Cuspidatum Root Extract

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