Science
Mechanism of Action
Carbon functions via adsorption, a physical process where its vast internal surface area (reaching up to 2000 m²/g) utilizes a negative surface charge to attract and bind positively charged impurities. This electrical attraction traps toxins, pathogenic bacteria, and oxidized sebum within its microscopic pores, allowing them to be efficiently rinsed away.
Research
Clinical Evidence
Medium confidence4.8%
Key findings
- 01 A 25% coconut-shell derived formulation demonstrated significant brightening on xerotic skin over 30 days without inducing inflammatory responses.
- 02 Clinical observations indicate a transient expansion of follicular openings to facilitate debris removal, with pore dimensions returning to baseline within 60 minutes of application.
Transparency
Dusting Analysis
Due to its intense pigmenting power, charcoal is frequently used at 'claim levels' (0.01%–0.1%) to color a formula grey or black without providing functional adsorption. Clinical benefits typically require concentrations closer to the 1-5% range.
The Formula
Formulation
Stability
Chemically inert and thermally stable; however, as an insoluble particulate, it requires a robust suspension system to prevent sedimentation. Best incorporated during the cooling phase to ensure homogeneous dispersion.
Synergies
- Salicylic Acid
- Kaolin Clay
- Bentonite
Conflicts
- Strong Oxidizers
- Concentrated Mineral Acids
- Strong Alkaline Bases
Safety
Safety Profile
The 2023 CIR assessment confirms safety for plant-derived charcoal in current cosmetic practices. While CI 77266 (Carbon Black) is an FDA-approved colorant, Charcoal Powder is categorized as a functional additive.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An exceptional inert purifier for congested skin types, provided it is formulated at functional percentages rather than decorative levels.
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