Rhus Semialata (Chinese sumac/gallnut) extract is a tannin-rich botanical used in skincare for its antioxidant, astringent, and antimicrobial properties. It is valued for gallotannin content that may help with skin tightening and protection against oxidative stress.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation | Uncommon | High tannin content can cause mild irritation, especially on sensitive or compromised skin. |
Allergic contact dermatitis | Rare | Plants in the Anacardiaceae family may rarely provoke sensitization in susceptible individuals. |
Skin dryness or tightness | Uncommon | Astringent action may cause a drying sensation with frequent use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.