SH-POLYPEPTIDE-28 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

SH-POLYPEPTIDE-28

Safety grade: A

This is a specially designed protein chain made in a laboratory that mimics natural hair proteins. It helps repair and strengthen hair by filling in damaged areas and coating the hair shaft.

This conditioning agent coats and strengthens hair, reducing frizz and improving manageability while helping to restore shine and smoothness to damaged or dry hair.

Graded using: COSING.

Last verified: May 26, 2026