PEG-4 PROLINE LINOLEATE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PEG-4 PROLINE LINOLEATE

Safety grade: A

This is a lab-created ingredient made by combining proline (an amino acid) with linoleic acid (a beneficial fat found in plants) and modified with a special ingredient called PEG. It's designed to help skin feel soft and smooth.

This ingredient acts as an emollient, meaning it helps soften and moisturize the skin by sealing in hydration and creating a smooth, comfortable feel.

Graded using: COSING.

Last verified: May 26, 2026