Back to Ingredient Dictionary

PEG-8

Description

PEG-8, also known as polyethylene glycol 400, is a synthetic polymer widely used in skincare and cosmetic formulations. This water-soluble compound serves multiple functions, including as a humectant, solvent, and emollient. Its molecular structure allows it to attract and retain moisture, making it effective in hydrating the skin and improving product texture.

In skincare formulations, PEG-8 acts as a penetration enhancer, facilitating the absorption of other active ingredients into the skin. It also helps to create a smooth, even application of products. The ingredient's ability to mix with both water and oil-based substances makes it valuable in creating stable emulsions and improving product consistency.

PEG-8 is generally considered safe for use in cosmetics, with a low risk of skin irritation. However, individuals with sensitive skin should perform patch tests before widespread use. The ingredient's molecular weight is low enough to penetrate the skin barrier, which contributes to its effectiveness but also raises concerns about potential systemic absorption.

Formulators often choose PEG-8 for its versatility and compatibility with a wide range of other ingredients. It can be found in various products, including moisturizers, serums, and cleansers, contributing to their overall efficacy and sensory properties.