Science
Mechanism of Action
Polyglyceryl-4 Caprate functions primarily as an emulsifying agent, preventing the separation of immiscible oil and water components in a formulation. It also acts as a solubilizer, effectively dispersing lipophilic ingredients like essential oils or fragrances within aqueous solutions. On the skin, it serves as a conditioning agent and emollient, fortifying the skin barrier, diminishing transepidermal water loss, and promoting skin elasticity and smoothness. Furthermore, its surfactant properties reduce surface tension, aiding in cleansing and foam generation, and it can stabilize fragrances.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 The Cosmetic Ingredient Review (CIR) Expert Panel evaluated its safety and general usage range, affirming its role in various leave-on and rinse-off formulations.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient maintains stability across a broad pH range of 4.0-10.0, although some sources specify optimal stability between pH 5.5-10.0 or 4.5-6.5. It is suitable for cold processing and can be integrated into the water phase. Formulators should avoid exposing it to temperatures exceeding 80°C. Turbidity may occur during storage, which can typically be resolved by homogenizing at approximately 30°C without compromising performance. For solubilization, it is advisable to pre-mix Polyglyceryl-4 Caprate with the oil-loving material before gradually incorporating water.
Synergies
- carbomers
- xanthan gums
- acrylic biopolymers
- cellulose derivatives
- electrolytes (e.g., NaCl, MgSO4)
- various oils (vegetable, mineral, silicone, esters)
- UV filters
- pigments
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded in 2023 that Polyglyceryl-4 Caprate is safe for cosmetic use, provided formulations are non-irritating. It is deemed safe up to 1.5% in leave-on and rinse-off products. Its use is approved by regulatory bodies like the European Union's Cosmetics Regulation. While generally well-tolerated with minimal reports of irritation, its specific FDA GRAS status as a cosmetic ingredient is not explicitly stated, although related fatty acids and monoacylglycerides are recognized as GRAS.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyglyceryl-4 Caprate is a valuable ingredient for precision skincare, offering effective emulsification and solubilization alongside significant skin conditioning benefits across various skin types.
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