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Antioxidant

CYSTEINE/OLIGOMERIC PROANTHOCYANIDIN

80

Safety score · 0–100

Good

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

A complex of the amino acid L-cysteine bound with grape-seed-style oligomeric proanthocyanidins, used as a skin-conditioning antioxidant. Both components have strong safety records at cosmetic levels.

Function

SKIN CONDITIONING

Skin benefits

  • Antioxidant cysteine + OPC pairing for oxidative stress defence
  • Supports skin barrier via thiol chemistry
  • Polyphenol radical scavenging
  • Generally well tolerated

Known concerns

  • Cysteine can have a mild sulfur odour at high levels
  • Potential sensitisation in atopic users at unusual concentrations

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.