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Polygonum Cuspidatum Root Extract

What Polygonum Cuspidatum Root Extract is & what it does

A knotweed extract and natural source of resveratrol, a strong antioxidant that helps protect skin from environmental and UV-related stress. It supports a more even look.

What does Polygonum Cuspidatum Root Extract do in skincare?

Polygonum Cuspidatum Root Extract, from Japanese knotweed, is used as a botanical antioxidant and conditioning ingredient. It is a natural source of resveratrol-type compounds, which is why it is popular in antioxidant-focused formulas. It is commonly included to support a product's overall protective profile.

Is Polygonum Cuspidatum Root Extract safe?

This knotweed root extract is generally considered safe for topical use in cosmetics at typical levels. It is valued for its antioxidant content rather than any strong active effect on skin. People with sensitive skin can patch test a new product first.

Is Polygonum Cuspidatum Root Extract natural or synthetic?

Polygonum Cuspidatum Root Extract is a natural ingredient obtained from the root of the Japanese knotweed plant. It is prepared by extracting the botanical material into a cosmetic carrier. Because it is plant-derived, it is generally suitable for vegan formulas.

Sunscreens with Polygonum Cuspidatum Root Extract

We rate 76 sunscreens that contain it, showing the top 10 by overall score:

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