Science
Mechanism of Action
This extract operates through several key pathways: it exhibits antioxidant activity by effectively scavenging free radicals and anti-inflammatory effects by inhibiting tumor necrosis factor-α (TNF-α) production, primarily due to its coumarin content. It also moderately inhibits tyrosinase, leading to melanin reduction, and stimulates collagen production in human fibroblasts. Furthermore, it demonstrates broad-spectrum antibacterial properties against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria, acts as an astringent to regulate sebum, and offers UV-absorbing capabilities for photoprotection.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Demonstrated no toxicity in immortalized human epidermal keratinocytes (HaCaT cells) while effectively enhancing collagen production in human foreskin fibroblasts (HFF-1 cells). It also reduced melanin content and provided moderate tyrosinase inhibition in murine melanoma (B16F10) cells without observed toxicity.
- 02 Exhibited significant antioxidant activity, with an IC50 value of 60.14 µg/mL in the DPPH free radical scavenging assay, indicating superior performance compared to watery extracts.
- 03 Key coumarin compounds isolated from Thanaka bark inhibited tumor necrosis factor-α (TNF-α) production in lipopolysaccharide-induced THP-1 human monocytic cells, underscoring its anti-inflammatory efficacy.
Transparency
Dusting Analysis
Based on robust in vitro evidence across multiple studies, demonstrating significant effects on collagen synthesis, melanin reduction, antioxidant capacity, and anti-inflammatory pathways at relevant concentrations, Hesperethusa Crenulata Bark Extract appears to be a genuinely active ingredient, not typically used for 'dusting' purposes.
The Formula
Formulation
Stability
While no optimal pH range for stability has been specifically identified, the ingredient's diverse extractability using both polar and non-polar solvents (e.g., water, ethanol, hexane, ethyl acetate, methanol, glycerol) indicates the presence of compounds with broad solubility characteristics. Thanaka bark powder itself has also been noted to absorb both water and oil.
Safety
Safety Profile
Comprehensive safety evaluations indicated no detectable genotoxicity across various extracts and the raw bark powder. Cytotoxicity was exceptionally low, with an IC50 value exceeding 12 mg/mL for the water extract, and no toxicity observed in human epidermal keratinocytes at concentrations below 1000 µg/mL. Its extensive traditional use in Myanmar for over a millennium further supports its safety profile; however, it has not been formally reviewed by CIR, SCCS, or FDA panels.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hesperethusa Crenulata Bark Extract offers a multifaceted approach to skin health, combining antioxidant, anti-inflammatory, collagen-boosting, and melanin-reducing properties with a favorable safety profile supported by traditional use and in vitro data.
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References
Sources