OLIGOPEPTIDE-138 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OLIGOPEPTIDE-138

Safety grade: A

A protein-derived ingredient made from amino acids, the building blocks of skin. It works to help improve skin firmness and elasticity by supporting the skin's natural structure. Commonly used in anti-aging and moisturizing products to promote a smoother, more youthful appearance.

Graded using: COSING.

Last verified: June 9, 2026