TETRAPEPTIDE-32 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TETRAPEPTIDE-32

Safety grade: A

This is a small chain of amino acids (the building blocks of proteins) that is created in a laboratory. It works to strengthen and protect hair while also helping to shield skin from environmental damage.

Tetrapeptide-32 is used in hair and skincare products to condition and smooth hair while providing protective benefits that help defend skin against external stressors.

Graded using: COSING.

Last verified: May 26, 2026