Science
Mechanism of Action
This ingredient operates on multiple levels due to its unique structure, which includes a UV-absorbing p-methoxycinnamoyl group. On the skin, it forms a protective film, acts as a light stabilizer by attenuating UV exposure, and provides antioxidant defense against free radical damage. Clinically, it has been shown to boost cell viability and reduce cellular stress markers like p53 protein expression in fibroblasts following UV exposure, simultaneously diminishing sunburn cells and mast cell presence in irradiated skin.
Research
Clinical Evidence
Medium confidence10%
Key findings
- 01 A 10% cream containing Methoxycinnamidopropyl Polysilsesquioxane demonstrated significant photoprotection in human skin, achieving SPF values comparable to 5% ethylhexyl methoxycinnamate and superior to 5% titanium dioxide. In vitro and ex vivo studies further revealed its ability to increase fibroblast cell viability, suppress p53 protein expression after UV exposure, and reduce UV-induced sunburn cells and mast cells in animal models.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Formulations containing this ingredient may require higher UV irradiation doses to ensure optimal photostability. Polysilsesquioxane resins, including this derivative, can be cured at elevated temperatures, though formulation and catalysis are typically conducted at or below room temperature.
Safety
Safety Profile
The CIR Expert Panel has deemed polysilsesquioxanes, encompassing Methoxycinnamidopropyl/Phenyl Polysilsesquioxane, safe for use in cosmetic formulations under current practices. Human studies reported no adverse reactions such as erythema, edema, itching, or tingling, supporting its favorable safety profile.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Methoxycinnamidopropyl/Phenyl Polysilsesquioxane is a valuable multifunctional ingredient, providing significant photoprotective, antioxidant, and skin-conditioning benefits with a favorable safety profile across all skin types.
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References
Sources