Polygonum Cuspidatum Root Extract
A polygonum root extract, a natural source of resveratrol. An antioxidant that supports skin defense. Well tolerated.
Evidence by route
Topical application
An antioxidant plant extract. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Polygonum Cuspidatum Root Extract is the most common plant source of resveratrol. In a formula it works as an antioxidant: it helps neutralize free radicals and protect the lipids of both product and skin against oxidative stress. As an active it has a reasonable basis. Resveratrol has solid antioxidant data in vitro and some promising topical studies, though it is light-unstable and its real effect depends on concentration and good formulation. It is a good antioxidant support next to sun protection, not a miracle anti-aging active on its own. Topically the systemic contribution is negligible, so it can be used during pregnancy and breastfeeding. Tolerance is good: low irritation and allergy, suitable for sensitive skin. It has no meaningful comedogenic profile, so it fits any skin type.
Frequently asked questions
Is Polygonum Cuspidatum Root Extract safe during pregnancy?
Polygonum Cuspidatum Root Extract is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Polygonum Cuspidatum Root Extract for?
Polygonum Cuspidatum Root Extract suits: normal, dry, combination, oily, sensitive.
What is Polygonum Cuspidatum Root Extract and what does it do in cosmetics?
A polygonum root extract, a natural source of resveratrol.
What's the INCI name for Polygonum Cuspidatum Root Extract?
The INCI name is Polygonum Cuspidatum Root Extract. It may also appear as: Resveratrol Source.
See Polygonum Cuspidatum Root Extract in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Similar role in the formula
Explore by category
Published: · updated: