R-(METHIONYL SH-POLYPEPTIDE-8 DECAPEPTIDE-40) is graded A (Safe) by Expert·ING, based on COSING regulatory data.

R-(METHIONYL SH-POLYPEPTIDE-8 DECAPEPTIDE-40)

Safety grade: A

This protein-based ingredient is derived from amino acids and is designed to support skin's natural repair processes. It works by helping to strengthen and protect the skin's barrier, potentially improving texture and resilience. It's commonly used in anti-aging and skin-conditioning products.

Graded using: COSING.

Last verified: June 9, 2026