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Antioxidant

ISOQUERCETIN

CAS 482-35-9
80

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

Isoquercetin — a more soluble glucoside of the flavonoid quercetin. A widely studied antioxidant; broadly safe with no GHS hazard flags in cosmetic use.

Skin benefits

  • Quercetin glucoside antioxidant
  • Anti-inflammatory
  • Better bioavailability than quercetin

Known concerns

  • May colour products yellow
  • Limited cosmetic CIR review

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.