TRIDECAPEPTIDE-1 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TRIDECAPEPTIDE-1

Safety grade: A

This is a small chain of 13 amino acids (the building blocks of proteins) that is designed to help improve skin texture and firmness. It works by signaling skin cells to strengthen and support the skin's natural structure.

This ingredient conditions and firms the skin by stimulating the production of structural proteins, helping to improve skin elasticity and create a smoother, more youthful appearance.

Graded using: COSING.

Last verified: May 26, 2026