TETRAPEPTIDE-124 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TETRAPEPTIDE-124

Safety grade: A

A laboratory-created protein fragment that works to strengthen and support your skin's structure. It helps improve skin firmness and elasticity by promoting natural repair processes, making it a popular choice in anti-aging and lifting formulas.

Graded using: COSING.

Last verified: June 9, 2026