OLIGOPEPTIDE-199 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OLIGOPEPTIDE-199

Safety grade: A

This ingredient is a short chain of amino acids (the building blocks of protein) designed to help strengthen and firm skin. It works by supporting the skin's natural structure, potentially improving elasticity and reducing the appearance of fine lines. It's commonly used in anti-aging and firming skincare products.

Graded using: COSING.

Last verified: June 9, 2026