CYCLO(PROLYLPROLINE) is graded A (Safe) by Expert·ING, based on COSING regulatory data.

CYCLO(PROLYLPROLINE)

Safety grade: A

This ingredient is a naturally derived compound made from amino acids that helps support skin's firmness and elasticity. It works by promoting collagen production and improving skin texture, making it a popular choice in anti-aging and skincare products aimed at reducing the appearance of fine lines.

Graded using: COSING.

Last verified: June 9, 2026