TETRACARBOXYMETHYL TETRAPEPTIDE-91 N6-TRIPEPTIDE-91 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TETRACARBOXYMETHYL TETRAPEPTIDE-91 N6-TRIPEPTIDE-91

Safety grade: A

This lab-created peptide is designed to help firm and lift skin by stimulating collagen production and improving skin structure. It works by signaling skin cells to strengthen their support network, potentially reducing the appearance of fine lines and sagging over time.

Graded using: COSING.

Last verified: June 9, 2026