SH-POLYPEPTIDE-120 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

SH-POLYPEPTIDE-120

Safety grade: A

This is a chain of amino acids (the building blocks of proteins) that helps strengthen and smooth your skin and hair. It works by forming a protective layer on the surface, improving texture and reducing frizz while helping your skin retain moisture for a softer, more supple appearance.

Graded using: COSING.

Last verified: June 9, 2026