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

ACETYL PROLINE

Safety grade: A

Acetyl Proline is a modified amino acid (a building block of proteins) that is created through chemical processing. It helps soften and smooth the skin while improving its texture and appearance.

This ingredient is used as an emollient to soften and hydrate the skin, helping products feel smooth and comfortable while improving skin's overall suppleness.

Graded using: COSING.

Last verified: May 26, 2026