TETRAPEPTIDE-49 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

TETRAPEPTIDE-49

Safety grade: A

This is a lab-created protein fragment made up of four amino acids linked together. It's designed to help improve skin firmness and reduce the appearance of fine lines by supporting the skin's natural structure. You'll typically find it in anti-aging serums and creams.

Graded using: COSING.

Last verified: June 9, 2026