HEPTAPEPTIDE-13 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

HEPTAPEPTIDE-13

Safety grade: A

This is a small protein fragment made of seven amino acids linked together. It's designed to strengthen and protect hair while also helping to protect and condition the skin.

This ingredient works by conditioning and smoothing hair while forming a protective barrier on the skin to help prevent damage and maintain moisture.

Graded using: COSING.

Last verified: May 26, 2026