Rhus coriaria (sumac) leaf/stem extract is a plant-derived ingredient rich in polyphenols, tannins, and flavonoids used in skincare for its antioxidant and astringent properties. It may help support skin tone and provide protection against oxidative stress.
| Reported effect | How often | Notes |
|---|---|---|
Contact dermatitis / skin irritation | Uncommon | Tannin-rich plant extracts can occasionally cause irritation, particularly on sensitive skin. |
Allergic contact reactions | Rare | Members of the Anacardiaceae family may trigger sensitization in predisposed individuals. |
Skin dryness or tightness | Rare | Astringent tannins may cause a temporary drying effect with frequent use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.