Sophora Japonica Flower Extract
INCI: SOPHORA JAPONICA FLOWER EXTRACT
Reviewed by Kate · Last updated 14 Aug 2026
A traditional botanical extract with emerging evidence for UV and oxidative stress protection
Best For Skin Types
All
Addresses
Usage Frequency
Daily
What Is Sophora Japonica Flower Extract?
Sophora japonica flower extract is derived from the flower buds of the Sophora japonica plant, a species used in traditional Chinese, Japanese, and Korean medicine for centuries. The extract contains a complex mixture of bioactive compounds including flavonoids, isoflavonoids, polysaccharides, and triterpenes, which give it multiple potential benefits for skin.
In skincare formulations, this ingredient is primarily used for its protective properties. The polysaccharide and flavonoid components are thought to help defend skin against environmental stressors, particularly UV radiation and oxidative damage.
How It Works
The protective effects appear to work through multiple pathways. The polysaccharides in the extract seem to help reduce cellular damage caused by UVB radiation when applied beforehand. The flavonoids work as antioxidants, neutralising reactive oxygen species (free radicals) that accumulate in response to UV exposure and environmental stress.
Network pharmacology research suggests the extract may interact with pathways involved in inflammation and skin irritation, though the precise mechanisms in living skin remain under investigation. Most current evidence comes from cell culture studies rather than human clinical trials.
Clinical Evidence & References
Current evidence is primarily from laboratory and cell-based studies. Research using cultured human keratinocytes (skin cells) shows that Sophora japonica extract can reduce UVB-induced damage when cells are pretreated with the ingredient. The extract also demonstrates antioxidant activity and may support skin cells under oxidative stress.
However, evidence from human skin studies is limited. Most research supporting its use comes from traditional medicine applications and laboratory models. Further clinical trials on human skin would help establish its efficacy at typical cosmetic concentrations and provide clearer guidance on real-world benefits.
Published Research
How to Use
Sophora japonica flower extract is typically found in serums, essences, and protective skincare products at low concentrations. It works best as part of a broader skincare routine that includes dedicated sun protection. Apply products containing this ingredient to clean skin, ideally before sun exposure or as part of your morning routine, to maximise its protective potential.
Safety & Precautions
Frequently Asked Questions
From the Clinic
Not sure what your skin actually needs?
Two minutes, a few questions, and we’ll point you at what matters — no guesswork.
Take the skin quizOther forms of Sophora Japonica Flower Extract
These appear on ingredients lists under different names but are the same substance. Sophora Japonica Flower Extract is the common form.
Related Ingredients
Sophora Japonica Root Extract
A plant extract with antioxidant properties to help protect and support skin
Sophora Japonica Bud Extract
Plant extract derived from Japanese pagoda tree buds, traditionally valued for calming skin
Soluble Proteoglycan
A naturally occurring molecule that helps maintain skin's structural integrity and hydration
Sophora Angustifolia Root Extract
A plant extract traditionally used in Asian skincare to support skin conditioning
Sophora Flavescens Extract
A plant extract traditionally used to address inflammation and uneven skin tone
Sorghum Bicolor Leaf/Stem Extract
A plant-derived conditioning agent that helps support skin hydration and suppleness
Learn More About Skincare Ingredients
Explore our comprehensive ingredient glossary to understand what's in your products.
Browse All IngredientsShop Our Products
Find professional skincare solutions at Skintique.