Castanea Sativa (Chestnut) Seed Extract is a plant-derived extract rich in polyphenols and tannins used in skincare for its antioxidant, soothing, and skin-conditioning properties. It is often included to help protect against environmental free radicals and support skin barrier comfort.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation or redness | Rare | Possible in sensitive individuals, often related to tannin content or formulation concentration. |
| Allergic contact dermatitis | Very rare | Isolated sensitization reactions reported with botanical extracts; patch testing advised for those with plant allergies. |
| Stinging or tingling on application | Rare | Transient sensory effect, typically on compromised or reactive skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.