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This is a broad term referring to various materials derived from animals that are not the primary product (e.g., meat). Specific animal by-products used in cosmetics, such as lanolin or collagen, would have their own INCI names and functions.
No specific concern data available
Safety summary
The safety profile varies widely depending on the specific animal by-product. Without a specific INCI name, a general safety assessment cannot be provided.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.