Quercus Mongolia (Mongolian oak) leaf extract is a botanical ingredient rich in polyphenols and tannins, used in skincare for its antioxidant and anti-inflammatory properties. It is primarily included to help protect skin from oxidative stress and to provide a soothing effect.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation | Rare | Mild redness or stinging possible, particularly in sensitive skin or at higher concentrations. |
Allergic contact dermatitis | Rare | Botanical and tannin-containing extracts can occasionally trigger sensitization in predisposed individuals. |
Skin dryness/tightness | Very rare | Tannin content may have a slight astringent effect. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.