TETRAPEPTIDE-84 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TETRAPEPTIDE-84

Safety grade: A

This is a lab-created protein fragment made of four amino acids linked together. It's designed to help firm and smooth the skin by supporting its natural structure and reducing the appearance of fine lines. You'll find it in anti-aging skincare products like serums and creams.

Graded using: COSING.

Last verified: June 9, 2026