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Antioxidant

BIS-DEMETHOXYCURCUMIN

CAS 33171-05-0
78

Safety score · 0–100

Fine

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

A close cousin of curcumin sourced from turmeric, used for antioxidant and brightening positioning. It is more chemically stable than curcumin but still tints formulas a deep yellow.

Skin benefits

  • Curcuminoid with antioxidant activity comparable to curcumin
  • Studied for anti-inflammatory and skin-brightening effects in vitro
  • Reduces melanin production in melanoma cell studies
  • More resistant to alkaline degradation than curcumin itself

Known concerns

  • Strong yellow pigment can stain skin, fabric and packaging at usable doses
  • Topical bioavailability is limited and depends on the delivery system
  • Curcuminoids are occasional fragrance and contact allergens

References

EU

EU CosIng database

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

Related antioxidants

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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.