TRIPEPTIDE-66 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TRIPEPTIDE-66

Safety grade: A

A small protein fragment made from amino acids, this ingredient works to help firm and smooth the skin's appearance by supporting its natural structure. It's commonly used in anti-aging skincare products to reduce the look of fine lines and improve skin elasticity.

Graded using: COSING.

Last verified: June 9, 2026