Science
Mechanism of Action
PEG-240 operates by forming hydrogen bonds with water molecules, effectively drawing and retaining moisture within the skin for prolonged hydration. Its barrier-forming properties additionally help to minimize transepidermal water loss, supporting the restoration of the skin's natural barrier function, particularly beneficial for dry conditions. As a solid PEG, it also contributes to the desired consistency of cosmetic formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyethylene glycols demonstrate general stability. As the molar mass increases, there is a corresponding decrease in water solubility and hygroscopicity. Solid PEGs, such as PEG-240, are additionally utilized as consistency enhancers in formulations.
Safety
Safety Profile
The CIR Expert Panel has affirmed the safety of polyethylene glycol ingredients, including PEG-240, for use in cosmetics. Higher molecular weight PEGs (PEG-75 and above) exhibit minimal absorption through intact skin, are minimally irritating, and are not considered sensitizers. Initial concerns regarding kidney toxicity were linked to severely burned patients treated with PEG-based creams, but subsequent data clarified that significant penetration occurs only through severely damaged skin (second and third-degree burns); the CIR Expert Panel later removed this caveat. The FDA permits PEGs with an average molecular weight of 6,000 as a food additive, and PEG-240 is approved for general or specific limited food uses in the US. Manufacturers are advised to minimize impurities like ethylene oxide and 1,4-dioxane.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-240 is a valuable humectant and texture enhancer, offering long-term hydration and barrier support with a low safety risk profile across all skin types, including sensitive.
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