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

ACETYL HYDROXYPROLINE

Safety grade: A

Acetyl Hydroxyproline is a modified amino acid derived from collagen that acts like a moisture magnet for your skin and hair. It helps lock in hydration while providing a smooth, soft feel to cosmetic products.

This ingredient is used in skincare and haircare products to attract and retain moisture, condition and soften hair, protect the skin barrier, and leave skin feeling smooth and supple.

Graded using: COSING.

Last verified: May 26, 2026