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Prohibited Substance

melengestrol

CAS 5633-18-1
3

Safety score · 0–100

Avoid

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

A synthetic progestin used as a veterinary growth promoter. Banned in EU cosmetics under Annex II — sex hormones are categorically prohibited in personal-care products.

Skin benefits

  • Not a cosmetic ingredient

Known concerns

  • EU Annex II prohibited
  • Endocrine-active progestin
  • Veterinary pharmaceutical
  • No legitimate cosmetic use

References

EU

EU CosIng database

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

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Check your shelf

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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.