Isoquercitrin (quercetin-3-O-glucoside) is a plant-derived flavonoid glycoside used in skincare for its antioxidant, free-radical scavenging, and anti-inflammatory properties. It may help mitigate UV- and pollution-induced oxidative stress and support skin barrier function.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation (mild redness or stinging) | Rare | Generally well tolerated; mild transient irritation possible in sensitive skin. |
Allergic contact dermatitis | Very rare | Isolated potential for sensitization, as with other botanical flavonoids. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.