Science
Mechanism of Action
The efficacy of Sophora Japonica Root Extract is attributed to its diverse profile of bioactive components, including various flavonoids such as rutin, quercetin, and genistein, along with other phenolic compounds. These constituents deliver powerful antioxidant protection against free radical-induced damage and exhibit significant anti-inflammatory actions, thereby reducing redness and irritation. The extract actively strengthens the skin's barrier by modulating keratinocyte differentiation, and it contributes to a more uniform skin tone by inhibiting melanin production. Additionally, it functions as a skin conditioning agent, promoting soft, smooth skin, and can enhance capillary resistance.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Studies indicate that Sophora japonica extracts enhance the skin's barrier function by regulating keratinocyte differentiation, suggesting therapeutic potential for inflammatory conditions such as eczema, psoriasis, and atopic dermatitis.
- 02 Sophoricoside, an isoflavone isolated from Sophora japonica, demonstrated a 50-70% amelioration of 2,4-dinitrochlorobenzene-induced acute and chronic contact dermatitis at dosages of 3 mg/kg and 10 mg/kg.
- 03 A compound derived from Sophora japonica, N-feruloyl-N'-cis-feruloyl-putrescine, significantly inhibited cellular tyrosinase activity in human epidermal melanocytes with an IC50 of 85.0 microM, highlighting its potential for pigment inhibition.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The extract performs optimally within a slightly acidic to neutral pH range of 4.5 to 7.0. The integrity of active ingredients like rutin and quercetin is maintained during processing at temperatures up to 160°C, however, concentrations may decline significantly if subjected to extreme heat above 300°C.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) has not specifically evaluated Sophora Japonica Root Extract, although a related species, Sophora Flavescens Root Extract, is currently on its 2024 review priority list. The extract is generally considered safe for topical application, with adverse events like skin irritation or allergic reactions being uncommon. A patch test is advisable prior to widespread use. Data concerning the topical safety of Sophora Japonica extracts during pregnancy and breastfeeding are limited; therefore, consultation with a healthcare professional is recommended for these individuals.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sophora Japonica Root Extract is a valuable botanical ingredient, offering comprehensive benefits for skin health including antioxidant protection, anti-inflammatory effects, barrier reinforcement, and skin brightening, making it suitable for all skin types.
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