METHIONYL SH-POLYPEPTIDE-9 DECAPEPTIDE-40 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

METHIONYL SH-POLYPEPTIDE-9 DECAPEPTIDE-40

Safety grade: A

This is a laboratory-created protein fragment designed to work with your skin's natural processes. It's used in anti-aging and skin-firming products to help improve skin texture and support the skin's structural proteins, potentially reducing the appearance of fine lines and promoting a more youthful complexion.

Graded using: COSING.

Last verified: June 9, 2026