Science
Mechanism of Action
This ingredient functions by creating a hydrophobic, breathable film on the skin's surface, which effectively minimizes transepidermal water loss and locks in moisture. It acts as an emollient and humectant, softening and smoothing the skin while supporting the skin's natural barrier function. Its lubricating properties impart a desirable satiny feel, and it possesses inherent UV blocking capabilities that contribute to enhanced sun protection.
Research
Clinical Evidence
Medium confidence10%
Key findings
- 01 A 10% concentration of Acetyl Ethylhexyl Polyhydroxystearate (BioEstolide 1300) has been shown to enhance SPF, resulting in an SPF of 7.55.
Transparency
Dusting Analysis
No data indicates this ingredient is commonly dusted or has associated dusting concerns.
The Formula
Formulation
Stability
Exhibits excellent oxidative and thermal stability, which enhances product shelf life and improves the structural integrity of formulations.
Synergies
- Enhances SPF when combined with traditional UV filters.
Safety
Safety Profile
The CIR Expert Panel concluded that Polyhydroxystearic Acid, a key component, is safe for cosmetic use, noting that its large molecular size makes absorption unlikely. It is also described as non-toxic. A modified Human Repeated Insult Patch Test (HRIPT) on a product containing 3.45% Polyhydroxystearic Acid showed no adverse reactions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Acetyl Ethylhexyl Polyhydroxystearate is a valuable multi-functional ingredient, offering significant improvements in skin hydration and barrier function, a desirable skin feel, and a unique ability to boost SPF efficacy across a broad spectrum of cosmetic formulations.
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