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

PROLYL HYDROXYPROLINE

Safety grade: A

This amino acid compound supports your skin's natural collagen structure, helping to maintain firmness and elasticity. Derived from collagen breakdown, it works to strengthen the skin's foundation and may help reduce the appearance of fine lines. It's commonly used in anti-aging moisturizers and serums.

Graded using: COSING.

Last verified: June 9, 2026