Allium Cepa (onion) Extract is a plant-derived ingredient rich in flavonoids such as quercetin, used in topical formulations for its antioxidant, anti-inflammatory, and antibacterial properties. It is most commonly studied in scar-treatment gels, often combined with other agents like heparin and allantoin.
| Reported effect | How often | Notes |
|---|---|---|
| Mild application-site irritation or stinging | Uncommon | Transient redness or burning sensation, typically resolving after discontinuation. |
| Allergic contact dermatitis | Rare | Sensitization to onion-derived compounds reported in susceptible individuals. |
| Itching or rash at site of application | Uncommon | More likely in those with pre-existing sensitivity to Allium species. |
| Dryness or scaling | Rare | Occasionally noted with prolonged use in gel formulations. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.