Castanea Crenata (Chestnut) Shell Extract is a plant-derived extract rich in polyphenols and tannins used for its antioxidant and skin-conditioning properties, with some research suggesting anti-inflammatory and skin-brightening (tyrosinase-inhibiting) effects. It is typically incorporated into topical formulations to help protect skin from oxidative stress.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation (redness, stinging) | Rare | Possible in sensitive individuals, often related to concentration or tannin content. |
| Allergic contact dermatitis | Rare | Plant-extract sensitization is uncommon but possible in predisposed individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.