SR-DOG POLYPEPTIDE-4 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

SR-DOG POLYPEPTIDE-4

Safety grade: A

This protein-derived ingredient comes from dog sources and works to help strengthen and condition hair and skin. It forms a protective layer on the surface, helping to lock in moisture and improve texture and shine. It's commonly used in hair care and skincare products for its conditioning benefits.

Graded using: COSING.

Last verified: June 9, 2026