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Peer-reviewed reference cited in Deep Research evidence brief.
Sophora Flavescens Root Extract · 5% aqueous hydroglycerin stock
Unlock multi-functional botanical efficacy with Formulate Labs' Sophora Flavescens Root Extract, a fixed 5% hydroglycerin stock rich in key actives like quinolizidine alkaloids and prenylated flavonoids, known by trade names such as Sophora and Ku Shen.
Sophora flavescens root
Derived from the root of Sophora flavescens, known traditionally as Ku Shen or simply Sophora, Formulate Labs offers the INCI-named Sophora Flavescens Root Extract, not supplier-specific SKUs. This extract is characterized by a high concentration of active compounds including quinolizidine alkaloids and prenylated flavonoids, responsible for its multi-functional cosmetic activity.
Dual mechanism: Sophora Flavescens Root Extract provides targeted efficacy through several distinct biochemical pathways. Its bioactive alkaloids and flavonoids directly inhibit key signaling pathways to help modulate the skin's response to irritants and reduce the appearance of redness. This anti-inflammatory action is complemented by its antioxidant properties, which help protect the skin from environmental stressors. Cosmetically, it supports a clear and even-toned complexion as its prenylated flavonoids function as tyrosinase inhibitors to help manage the appearance of hyperpigmentation, while its alkaloid content provides broad-spectrum antimicrobial properties that disrupt the cellular integrity of microorganisms like Cutibacterium acnes and Staphylococcus aureus.
Use levels: For Formulate Labs' fixed 5% hydroglycerin stock, clinically observed efficacy of Sophora Flavescens Root Extract begins when the final formulation contains 0.05% of the extract. This corresponds to adding 1% of our 5% stock to a formulation. Maximum safe historical usage of the extract is documented up to 2.126% in leave-on applications and up to 8.33% in rinse-off products. Formulators should always conduct their own safety and stability testing.
Market context: Sophora Flavescens Root Extract is positioned in the B2B market as a premium, multi-functional botanical 'hero' ingredient. It serves as a clean-label, plant-derived alternative to synthetic biocides and soothing agents, meeting consumer demand for eco-certified solutions in acne management and sensitive skin care. Its broad-spectrum activity allows it to unify claims across multiple product categories, including anti-aging, skin soothing, and hair cycle support. The ingredient is further differentiated by an emphasis on supply-chain transparency, including sustainable, pesticide-free harvesting and standardized active constituent profiles that satisfy the rigorous quality requirements of high-end brands.
Pricing context: Publicly available pricing data for cosmetic-grade Sophora Flavescens liquid extracts is sparse, with raw botanical bulk powders varying widely depending on standardization. For a high-quality, standardized liquid extract like Formulate Labs' offering, a realistic B2B price structure is: 500 g sample at $117.00, 1 kg at $180.00, and 17 kg (pail) at $2,601.00 ($153.00/kg).
We ship a fixed 5% extract blend with selectable preservation - ready to meter into water-phase formulas at the use rates in the formulation guide below.*
Trade names (Sophora, Ku Shen) are distinct from Formulate Labs' INCI-compliant Sophora Flavescens Root Extract.
Every lot is produced to order in our AI-powered robotic factory. Nothing sits on a warehouse shelf going stale - you get a date-of-manufacture-fresh batch every time.
* Structure/function statements based on published cosmetic in-vitro studies. Not evaluated for, and not intended to, diagnose, treat, cure, or prevent any disease.
Sophora Flavescens Root Extract is documented in cosmetic peptide/protein literature. These are independent, third-party papers we link for formulators evaluating mechanism, tolerability, and published panel data. We did not conduct this research and do not guarantee replication in your finished formula.
These citations are provided for informational and formulation-research purposes only. Study designs, concentrations, vehicle systems, and populations vary and may not match the hydroglycerin stocks on this page. Published results do not constitute FDA or EU cosmetic claim substantiation for your brand. Always review the primary literature and consult your regulatory counsel before making structure/function statements on finished products.
Bulk composition at fixed 5% Sophora Flavescens Root Extract loading. Base carrier components scale proportionally when preservative is added; extract stays at 5%. Updates dynamically when you change base or preservation above. Full CAS disclosure is on the SDS/TDS for the selected variant (FL-SFR-W1-MBS4-5PCT-001).
SDS + TDS are issued per base and preservative combination. Links swap when you change selections above. COA is batch-specific and ships with the order.
Statements contained on this page (including any marked with *) have not been evaluated by the U.S. Food and Drug Administration. This product is a cosmetic raw material and is not intended to diagnose, treat, cure, or prevent any disease.