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Antioxidant

ISOQUERCITRIN

CAS 21637-25-2
80

Safety score · 0–100

Good

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

A flavonoid antioxidant naturally found in plants like onion and St. John's wort. Provides oxidative-stress protection on skin with no notable safety concerns.

Skin benefits

  • Plant-derived flavonoid antioxidant
  • Helps neutralize free radicals
  • Supports skin defence against oxidative stress

Known concerns

  • Slight yellow tint at high levels
  • Limited topical clinical data

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.