PENTAPEPTIDE-52 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PENTAPEPTIDE-52

Safety grade: A

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

Graded using: COSING.

Last verified: June 9, 2026