OLIGOPEPTIDE-259 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OLIGOPEPTIDE-259

Safety grade: A

This is a lab-created protein fragment designed to help improve skin's appearance and texture. It works by signaling skin cells to support firmness and elasticity, making it a common addition to anti-aging and moisturizing products. The ingredient is included in formulations to help promote smoother, more youthful-looking skin.

Graded using: COSING.

Last verified: June 9, 2026