SH-POLYPEPTIDE-14 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

SH-POLYPEPTIDE-14

Safety grade: A

This peptide is a chain of amino acids derived from yeast that helps strengthen and condition hair. It works by coating the hair shaft to improve texture, reduce frizz, and add shine. It's commonly found in shampoos, conditioners, and styling products.

Graded using: COSING.

Last verified: June 9, 2026