OCTAPEPTIDE-39 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OCTAPEPTIDE-39

Safety grade: A

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

Graded using: COSING.

Last verified: June 9, 2026