Polyglyceryl-5 Oleate
INCI: POLYGLYCERYL-5 OLEATE
Reviewed by Rosie · Last updated 14 Aug 2026
Also known as: Polyglyceryl-5 Oleate
An emulsifier derived from plant oils that stabilises oil and water in formulations
Best For Skin Types
All
Usage Frequency
Daily
What Is Polyglyceryl-5 Oleate?
Polyglyceryl-5 oleate is a plant-derived emulsifier made by combining glycerin with oleic acid (a fatty acid found in oils like olive and sunflower). In skincare formulations, it works to blend oil-based and water-based ingredients together, preventing them from separating. This allows formulators to create stable creams and lotions with varied textures and benefits.
As an emulsifier, it sits at the interface between oil and water molecules, holding them in suspension. This is a functional rather than active ingredient—its primary role is to maintain formulation stability rather than to deliver a direct skin benefit.
How It Works
Polyglyceryl-5 oleate is a surfactant, which means it has a dual affinity for both oil and water. One part of its molecular structure attracts to oily substances, whilst the other part attracts to water-based substances. This allows it to position itself between oil and water droplets, preventing them from coalescing and separating out.
In practical terms, this keeps your cream or lotion homogeneous, ensuring consistent product performance when you apply it to skin.
Clinical Evidence & References
Research on polyglyceryl-5 oleate specifically is limited. However, studies on related polyglyceryl emulsifiers—particularly polyglyceryl-3 oleate—demonstrate their effectiveness as formulation enhancers. One study used polyglyceryl-3 oleate as a chemical enhancer to improve the skin retention of a therapeutic compound, suggesting these emulsifiers can influence how ingredients penetrate and persist in skin.
There is anecdotal concern within some skincare communities that polyglyceryl-5 oleate may feed fungal acne (Malassezia), though robust clinical evidence supporting this specific link is lacking. Malassezia susceptibility is complex and multifactorial; formulation ingredients alone do not guarantee either benefit or harm in fungal acne conditions.
How to Use
This ingredient is present in formulations at the point of manufacture and requires no special application technique from the user. If you are using a product containing polyglyceryl-5 oleate, simply apply it as directed on the product label. If you have fungal acne or Malassezia-prone skin, patch testing new formulations is advisable, though this ingredient alone is not a contraindication.
Safety & Precautions
Frequently Asked Questions
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Polyglyceryl-4 Laurate
May be plant-derived or synthetic | Ester of a polymer of glycerin and lauric acid, present in coconut or palm oils
Polyglyceryl-4 Oleate
Ester of oleic acid and polyglycerin-4 | Emulsifying agent used to mix oil and water-based ingredients in formulas
Polyglyceryl-5 Dioleate
An emulsifier that helps blend oil and water-based ingredients in skincare formulations
Polyglyceryl-6 Behenate
A synthetic emulsion stabiliser that helps bind water and oil in formulations
Polyglyceryl-6 Caprylate
Gentle cleansing agent, emulsifier, and emollient | Commonly found in cleansing lotions, makeup removers, and micellar waters
Polyglyceryl-6 Distearate
Made from combining an ester of stearic acid with a polymer of glycerin | Works as an oil-in-water emulsifier, and cleansing agent
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