Science
Mechanism of Action
It functions as a potent tyrosinase inhibitor, downregulating the expression of MITF and TRP-1/2 through the modulation of MEK/ERK and AKT signaling pathways. Beyond brightening, it protects the dermal matrix by suppressing MMP-1 and elastase enzymes while simultaneously stimulating Type I procollagen synthesis and inhibiting NF-κB-driven inflammation.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 In an 8-week clinical trial involving 22 subjects, a cream enriched with Aster yomena callus pellet extract demonstrated a progressive reduction in melanin, reaching a significant 8.68% decrease in facial hyperpigmentation by the study's end.
Transparency
Dusting Analysis
Because it is an exotic botanical extract, it is often included at negligible 'claim-only' levels (below 0.1%). To see the clinical melanin-reduction benefits observed in research, concentrations near the 1-5% range or higher are recommended.
The Formula
Formulation
Stability
The extract is remarkably heat-stable. However, its anthocyanin content makes it a natural pH indicator; formulations exceeding pH 7.0 may undergo a color shift from violet/red to green/yellow.
Synergies
- Vitamin C
- Niacinamide
- Sunscreen filters
Conflicts
- Strong oxidizing agents
- Alkaline ingredients (above pH 7.0)
Safety
Safety Profile
Historically used as a functional food in South Korea and Japan, the extract shows negligible cytotoxicity in human keratinocyte models, suggesting a high safety profile for topical use.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A highly effective, low-irritation botanical alternative for treating hyperpigmentation and preserving skin elasticity.
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References
Sources