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This is the chemical symbol for Copper, not a standalone INCI ingredient. Copper is often incorporated into skincare products as part of compounds like Copper Gluconate or Copper Peptides, valued for their antioxidant and skin-supporting properties.
No specific concern data available
Safety summary
As 'CU' is a chemical symbol and not an ingredient, its safety profile is not applicable. The safety of copper-containing ingredients depends on the specific compound and concentration.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.