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Antioxidant

OXOTHIAZOLIDINECARBOXYLIC ACID

CAS 19771-63-2 Updated
78

Safety score · 0–100

Fine

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

About

A cysteine precursor (procysteine) used in skincare for antioxidant and conditioning effects. No major safety flags but a relatively niche cosmetic ingredient.

Function

SKIN CONDITIONING

Skin benefits

  • Cysteine precursor — antioxidant support
  • Skin conditioning
  • Mild profile in cosmetics

Known concerns

  • Limited cosmetic-specific safety dossier
  • Sulfur-amino-acid sensitivities possible
  • No major hazards reported

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 — always read the physical product label and consult a healthcare professional for personal concerns.