TETRAPEPTIDE-17 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TETRAPEPTIDE-17

Safety grade: A

Tetrapeptide-17 is a small protein fragment made up of four amino acids linked together. It's designed to help improve skin texture and appearance by supporting the skin's natural structure and firmness.

This ingredient conditions the skin by helping to improve elasticity, firmness, and overall skin tone, promoting a smoother and more youthful-looking complexion.

Graded using: COSING.

Last verified: May 26, 2026