Science
Mechanism of Action
This ingredient utilizes the semiconductor properties of cerium oxide to absorb broad-spectrum UVA and UVB radiation. The silica encapsulation serves as a physical shield to neutralize photocatalytic activity and prevent oxidative stress, while the talc substrate optimizes skin adhesion and provides a soft-focus effect to blur imperfections.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 Demonstrated superior SPF/PA boosting and transparency compared to traditional TiO2 and ZnO (2025).
- 02 In vivo validation of silica-coated composites showing significant reduction in ROS generation compared to raw ceria (2021).
Transparency
Dusting Analysis
Often marketed for its UV properties but included at sub-functional levels (under 3%) merely for marketing claims; concentrations below this threshold are unlikely to provide meaningful SPF boosting or notable optical blurring.
The Formula
Formulation
Stability
Highly stable mineral composite; the silica matrix prevents interactions between cerium oxide and sensitive organic lipids or actives.
Synergies
- Titanium Dioxide
- Zinc Oxide
- Organic UV Filters
- Antioxidants
Conflicts
- Strong acids (pH < 3.0)
- Cationic surfactants
Safety
Safety Profile
Recognized as a UV filter in the EU; currently utilized as a performance booster and opacifier in North American markets.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An advanced mineral composite that bridges the gap between high-level UV protection and elegant cosmetic transparency.
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References
Sources