OLIGOPEPTIDE-258 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OLIGOPEPTIDE-258

Safety grade: A

This is a lab-made protein fragment designed to help strengthen and support your skin's structure. It works by signaling skin cells to boost collagen and elastin production, which can help improve firmness and reduce the appearance of fine lines. It's commonly found in anti-aging serums and moisturizers.

Graded using: COSING.

Last verified: June 9, 2026