Science
Mechanism of Action
This extract operates through several pathways to enhance skin health. Its primary action involves providing robust antioxidant defense via compounds like quercetin and rutin, which neutralize free radicals and mitigate oxidative stress. It significantly reduces inflammation, manifesting as decreased swelling, redness, and irritation. A key mechanism is its ability to strengthen the skin barrier by promoting keratinocyte differentiation through miR-181a up-regulation. It also contributes to skin brightening by inhibiting tyrosinase, the enzyme responsible for melanin production. Furthermore, it supports skin rejuvenation by accelerating epidermal renewal and desquamation, and offers photoprotection against UV-induced damage and inflammation. The extract may also contribute to collagen synthesis, improving elasticity and reducing the appearance of fine lines, while regulating capillary permeability.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A 2018 study observed that Sophora japonica extracts, combined with troxerutin, accelerated keratinocyte differentiation through miR-181a up-regulation, indicating improved skin barrier function and potential benefits for conditions like eczema and psoriasis.
- 02 A 2021 study demonstrated that a methanol extract of Sophora japonica flower buds effectively reduced scaling, erythema, and skin thickening in a contact dermatitis murine model by inhibiting epithelial hyperplasia and immune cell infiltration.
- 03 The ingredient has been utilized as an active component in scalp serums at a concentration of 0.055%.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The raw extract's inherent high water content makes it prone to spoilage, necessitating proper preservation in cosmetic formulations. Its heat-sensitive compounds, such as rutin, require controlled temperature, pH, and processing time during extraction to maintain integrity. Optimal storage conditions involve a clean, cool, dry environment between 5-25°C, away from direct humidity and sunlight.
Safety
Safety Profile
While the ingredient, specifically Quercetin Dihydrate, holds a Generally Recognized as Safe (GRAS) status for food use by independent experts, its topical application is generally considered safe. Clinical and animal studies on its flower and bud as dietary supplements reported no serious adverse events. Uncommon side effects like minor skin irritation, redness, or allergic reactions are possible, thus a patch test is recommended. Due to insufficient data regarding topical application during pregnancy or breastfeeding, its use is not advised for these groups without professional medical consultation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sophora Japonica Bud Extract is a valuable, multi-functional botanical ingredient offering significant antioxidant, anti-inflammatory, and skin barrier strengthening benefits, suitable for a broad range of skin types and concerns.
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References
Sources