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This describes a biological process or condition related to hair and skin, not a cosmetic ingredient. Keratin is a structural protein in skin, hair, and nails.
No specific concern data available
Safety summary
This is not an ingredient, so a safety summary is not applicable. It describes a state that cosmetic products might aim to prevent or treat.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.