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

ACETYL HEPTAPEPTIDE-9

Safety grade: A

This is a synthetic peptide (a short chain of amino acids) designed to help relax facial muscles and reduce the appearance of expression lines. It works similarly to how muscle-relaxing treatments smooth out wrinkles caused by repeated facial movements.

This ingredient conditions and firms the skin by helping to reduce the appearance of fine lines and wrinkles, particularly those caused by facial expressions and muscle contractions.

Graded using: COSING, FDA.

Last verified: May 26, 2026