ACETYL TETRAPEPTIDE-9 is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

ACETYL TETRAPEPTIDE-9

Safety grade: A

This is a small chain of amino acids (the building blocks of proteins) that has been created in a laboratory. It's designed to help improve the appearance and feel of your skin by promoting firmness and elasticity.

This ingredient conditions and improves skin texture by helping to support the skin's natural structure, promoting a firmer and more youthful appearance.

Graded using: COSING, FDA.

Last verified: May 26, 2026