OLIGOPEPTIDE-173 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OLIGOPEPTIDE-173

Safety grade: A

This ingredient is a small chain of amino acids that helps support your skin's natural firmness and elasticity. It works by encouraging your skin to maintain its structure and resilience, making it useful in anti-aging and skin-firming products. It's created through laboratory synthesis rather than extracted from natural sources.

Graded using: COSING.

Last verified: June 9, 2026