SH-POLYPEPTIDE-109 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

SH-POLYPEPTIDE-109

Safety grade: A

This ingredient is a plant-derived protein that helps strengthen and condition hair and skin. It works by forming a protective layer that locks in moisture and improves texture, making hair smoother and skin softer. It's commonly used in shampoos, conditioners, and skincare products.

Graded using: COSING.

Last verified: June 9, 2026