Polyglyceryl-4 Oleate
Reviewed by Daisy · Last updated 18 Aug 2026
Also known as: Polyglyceryl Oleate
Ester of oleic acid and polyglycerin-4 | Emulsifying agent used to mix oil and water-based ingredients in formulas
Addresses
EWG Safety Score
What Is Polyglyceryl-4 Oleate?
Polyglyceryl-4 oleate, also known as polyglyceryl oleate, is an emulsifying and skin conditioning ingredient used in skin care products. It’s the ester of oleic acid, an omega-9 fatty acid, and polyglycerin-4, a glycerin-based polymer.
As an emulsifying agent, polyglyceryl-4 oleate works to mix oil and water-based ingredients, creating smoother, homogenous formulas. Although primarily used in skin care applications as an emulsifier, this ingredient also hydrates skin through its light emollient properties.
This multi-tasking ingredient appears as a yellow-to-amber liquid in its raw material state and is most often used in leave-on applications, like moisturizers, in concentration between 2-10%.
The Cosmetic Ingredient Review (CIR) Expert Panel reviewed polyglyceryl-4 oleate and consider it safe for use in cosmetics.
Clinical Evidence & References
Published Research
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UL Prospector, Accessed February 2023, Webpage [URL_NOT_FOUND]
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Journal of Nanoscience and Nanotechnology, December 2021, pages 6188-6195 [URL_NOT_FOUND]
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CIR Expert Panel, November 2016, ePublication [URL_NOT_FOUND]
From the Clinic
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