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PEG-18

Description

PEG-18, or polyethylene glycol 18, is a synthetic polymer widely used in cosmetic and skincare formulations. This water-soluble compound functions primarily as an emollient, humectant, and solubilizer. With its ability to attract and retain moisture, PEG-18 helps improve skin hydration and softness. It also aids in the uniform distribution of other ingredients within a product, enhancing overall formula stability.

In skincare applications, PEG-18 is particularly valued for its ability to form a protective barrier on the skin's surface, reducing transepidermal water loss. This property makes it beneficial in products designed for dry or dehydrated skin. Additionally, its solubilizing properties allow for the incorporation of both oil-soluble and water-soluble ingredients in a single formulation, expanding the range of active ingredients that can be effectively delivered to the skin.

While generally considered safe for topical use, individuals with sensitive skin should perform patch tests before widespread application. PEG-18's molecular weight is typically low enough to allow for some skin penetration, which can enhance the delivery of other beneficial ingredients. However, this characteristic also means it may potentially carry other substances deeper into the skin, necessitating careful formulation and quality control in product development.