Science
Mechanism of Action
This ingredient provides mechanical exfoliation by physically abrading dead skin cells. Its porous structure absorbs excess sebum, offering a mattifying effect, and acts as a platelet-shaped carrier for even pigment distribution.
Research
Clinical Evidence
High confidence25%
Key findings
- 01 Alumina was determined safe for use in skincare preparations up to 25%, effectively functioning as a thickener, absorbent, and pigment carrier due to its insolubility, preventing systemic toxicity.
Transparency
Dusting Analysis
Inhalation safety notes for spray products indicate particles are typically non-respirable (>10μm), suggesting minimal risk under normal application; specific dusting thresholds are not provided for general cosmetic use.
The Formula
Formulation
Stability
Optimal dispersion in aqueous systems is observed between pH 3 and 7.8 without dispersants; instability commonly occurs near its isoelectric point (~pH 9.1).
Conflicts
- Anionic polyelectrolytes
- Strong acids or bases
- Formulations requiring complete transparency
Safety
Safety Profile
Alumina is deemed safe due to its insolubility, minimizing skin penetration and systemic toxicity. Inhalation concerns in spray products are mitigated by typically non-respirable particle sizes (>10μm).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Alumina is a valuable, well-researched ingredient offering benefits for skin texture refinement, oil absorption, and formulation enhancement, particularly suitable for oily and normal skin types.
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