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Keratin is a fibrous protein naturally found in hair, skin, and nails. In cosmetics, it is commonly used in hair care products to strengthen hair, improve elasticity, and provide a protective barrier.
No specific concern data available
Safety summary
Generally considered safe for cosmetic use. Allergic reactions are rare, but individuals sensitive to animal-derived proteins should be cautious.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.