Science
Mechanism of Action
The ground seed particles physically dislodge accumulated dead skin cells from the stratum corneum through mechanical friction. Beyond exfoliation, the powder releases tea saponins and polyphenols which neutralize reactive oxygen species (ROS) and provide mild antimicrobial activity to purify the skin surface.
Research
Clinical Evidence
Medium confidence3%
Key findings
- 01 Concentrations between 1% and 5% are standard for achieving effective mechanical resurfacing without compromising the integrity of the epidermal barrier.
- 02 Chemical analysis reveals a minimum of 13% active tea saponins, which demonstrate potent in vitro antioxidant and antimicrobial properties.
Transparency
Dusting Analysis
Since its primary function is physical exfoliation, inclusion levels below 1.0% are often too sparse to provide a noticeable tactile effect, suggesting the ingredient may be added for label claims rather than functional performance.
The Formula
Formulation
Stability
Technically insoluble but water-dispersible; it is most stable when kept dry or maintained in slightly acidic aqueous environments to prevent the degradation of its active saponins.
Synergies
- Botanical oils
- Humectants
- Mild surfactants
Conflicts
- Strong oxidizing agents
- Highly alkaline formulations (pH > 7.0)
Safety
Safety Profile
While leaf extracts are well-characterized, the CIR currently lacks sufficient human sensitization data for the seed powder form specifically. However, it is generally regarded as low-irritancy in rinse-off applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An effective, natural mechanical exfoliant that offers secondary antioxidant and antimicrobial benefits for oily and normal skin types.
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References
Sources