Science
Mechanism of Action
Calcite functions as a high-capacity physical absorbent that selectively draws excess sebum and lipid-based impurities from the skin surface. Its unique crystalline geometry scatters light to diminish the appearance of pores and fine lines, while its alkaline nature allows it to neutralize localized acidity and provide gentle mechanical resurfacing.
Research
Clinical Evidence
High confidence10%
Key findings
- 01 Clinical evaluation of surface-reacted calcium carbonate demonstrated a significant reduction in surface sebum and skin glossiness at concentrations between 3% and 10%.
- 02 Short-term clinical studies in clay-based masks at 30% concentration confirmed high absorbency of grease and toxins, though required careful pH modulation for skin comfort.
Transparency
Dusting Analysis
While often used as a bulking agent, its functional benefits for oil control are clinically validated at 3% or higher. Concentrations below 1% in 'mattifying' products likely indicate use as a filler rather than an active sebum regulator.
The Formula
Formulation
Stability
Naturally raises aqueous formula pH to 8.0-9.5; chemically stable in neutral to alkaline environments but reacts vigorously with acidic components to release carbon dioxide.
Synergies
- Kaolin Clay
- Bentonite
- Titanium Dioxide
Conflicts
- Alpha Hydroxy Acids (AHAs)
- L-Ascorbic Acid
- Salicylic Acid
- Low-pH preservative systems (e.g., Sodium Benzoate)
Safety
Safety Profile
Generally regarded as non-sensitizing; however, its natural alkalinity requires formulation oversight to ensure the final product does not disrupt the skin's acid mantle.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An excellent mineral-based mattifier and pH buffer particularly suited for oily and congestion-prone skin types requiring a soft-focus finish.
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