Polyethylene is a synthetic polymer commonly used in cosmetics and personal care products. It is used to unite surfaces, dilute solids, form coatings, and polish teeth. Polyethylene is safe for use in cosmetics and personal care products according to the Cosmetic Ingredient Review (CIR) Expert Panel. However, concerns have been raised about the potential presence of residual impurities from the polymerization process. Polyethylene is also used as a thickener and protective agent in skincare products, helping to retain moisture and prevent water loss. It is commonly used as a cosmetic cream base and in pharmaceuticals as laxatives.
Helps to keep moisture in and protect the skin from water loss.
All skin types except those that have an identified allergy to it.
No significant dermal absorption. PEGs may be contaminated with measurable amounts of ethylene oxide and 1,4-dioxane, which are classified as known and possible human carcinogens respectively. PEGs have undergone this process. PEG compounds themselves show some evidence of genotoxicity and are not safe for use on damaged skin. PEG functions as a “penetration enhancer,” increasing the permeability of the skin to allow greater absorption of the product — including harmful ingredients.
Avoid using PEGs on damaged skin.
Polyethylene is made by linking ethylene molecules to form a larger molecule that has a branched chain structure.
The CIR Expert Panel concluded that polyethylene was safe for use in cosmetic and personal care products.
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Polyethylene is widely used in food packaging materials and in medical devices such as prosthetics. It is also used as an abrasive ingredient in products such as exfoliator and toothpaste, but its use in microbeads has been banned in many countries due to environmental concerns. Polyethylene is a major contributor to plastic pollution, with the cosmetics industry being a significant source of plastic waste. Propylene glycol is a related chemical that, like PEGs, functions as a penetration enhancer and can allow harmful ingredients to be absorbed more readily through the skin. It can also cause allergic reactions.
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