Sophora Japonica Bud Extract (Quercetin 95%)

Product Description

Sophora Japonica Bud Extract Quercetin 95% is a high-purity natural flavonoid plant extract. As one of nature's most potent antioxidants and free radical scavengers, quercetin excels in supporting immune health, respiratory wellness, inflammatory response, and cardiovascular protection. Our product utilizes a proprietary extraction and crystallization purification process, ensuring a stable quercetin content of ≥95.0% (tested via HPLC). Its fine, light-yellow powder appearance (95% passing through a 200-mesh sieve) enables effortless, uniform blending in capsule filling, tablet compression, and custom nutritional powder formulas, making it an ideal core raw material for advanced dietary supplements, sports nutrition, and anti-aging formulations.

Key Features & Highlights

• High-Potency 95% Purity Standard: Rigorously verified via HPLC to meet a ≥95.0% active quercetin assay specification, ensuring consistent, high-efficiency antioxidant efficacy across every batch.

• Natural Sophora Japonica Bud Source: Derived exclusively from premium Sophora Japonica L. flower buds through natural extraction without chemical synthesis.

• Micronized Fineness (200 Mesh): 95% passing a 200-mesh sieve for uniform particle distribution, substantially improving tablet hardness and capsule filling fluency.

• International-Grade Heavy Metal & Microbial Control: Trace-level management of lead, arsenic, cadmium, and mercury, with strict negative results for coliforms, salmonella, and staphylococcus aureus.

• High Stability & Synergistic Compatibility: Exhibits strong molecular stability, making it well-suited for high-performance combinations with Vitamin C, bromelain, zinc, or apple polyphenols to drive robust synergistic antioxidant activity.

Product Specifications 

The following represents typical quality control standards for the product (Execution Standards: GB 5009 / GB 4789 / Internal Strict Control Standards):

Formulator's Guide & Processing Advantages

• Bioavailability Enhancement Strategies: Because quercetin is a lipophilic flavonoid, co-formulation with bromelain or sunflower lecithin in capsules/tablets—or incorporation via liposomal delivery systems—is recommended to maximize human absorption rates.

• Capsule & Tablet Processing: The uniform 200-mesh fineness guarantees excellent powder fluidity, fitting smoothly into high-speed capsule filling and direct compression manufacturing lines. Incorporating appropriate excipients like microcrystalline cellulose (MCC) or magnesium stearate as flow aids and lubricants is advised.

• Light and Moisture Protection: Quercetin is sensitive to intense light and heat-humidity conditions. Encapsulation should take place in dry environments (relative humidity < 50%) using light-shielding, airtight packaging materials.

Applications

• Immune & Respiratory Health Supplements: Compound quercetin capsules, respiratory comfort blends, and seasonal immune support formulas.

• Anti-Aging & Antioxidant Formulations: Cardiovascular health tablets and cellular longevity supplements (combined with NMN or resveratrol).

• Sports Nutrition & Recovery: Post-workout anti-inflammatory recovery powders and joint health capsules.

• Functional Beverages & Premixes: High-purity botanical antioxidant premixes, herbal teabags, and health softgels.
  
  

Quality Assurance & Global Compliance

• Standardized ISO/HACCP Production: Manufacturing strictly adheres to international botanical extract GMP guidelines, with complete COA testing reports supplied for every production batch.

• Strict Residual Solvent & Pesticide Control: Meets USP and EP limits regarding residual solvents and pesticide residues in herbal extracts.

• Non-GMO & Allergen-Free: Purely plant-derived, non-irradiated, non-GMO, and completely free from gluten, soy, and dairy allergens.

Why Choose Keep Ingredients?

Keep Ingredients focuses on the global supply of premium botanical extracts and natural nutritional ingredients:

• Extensive Global Export Experience: Products are exported across North America, Europe, Australia, and Southeast Asia, ensuring deep familiarity with worldwide dietary supplement raw material regulations.

• Efficient Customs Support & Documentation: Backed by long-term international freight partners to swiftly deliver comprehensive customs clearance dossiers (COA, MSDS, Allergen Statement, Non-GMO, Flow Chart, etc.) for seamless entry.

• Flexible Trial Orders & Free Samples: Accommodates flexible minimum order quantities (MOQs) with a well-stocked sample library, ready to dispatch free samples to your R&D team for efficient testing.

FAQ

Q1: Is your quercetin sourced from Sophora Japonica or Smoketree?

A1: Our quercetin is derived entirely from premium natural Sophora Japonica L. flower buds. Sophora-sourced quercetin delivers high bioactivity, minimal impurities, and a clean flavonoid profile, making it the globally preferred choice for dietary supplements.

Q2: How soluble is quercetin in water, and how should it be used in liquid formulas?

A2: Pure quercetin powder is poorly water-soluble (sparingly soluble in alcohol and alkaline solutions). For liquid beverages or drink mixes, we recommend utilizing micronized encapsulation technology or liposomal/cyclodextrin inclusion processes to enhance suspension stability and bioavailability.

Q3: Does the product meet North American and European heavy metal and microbiological standards?

A3: Yes. Our Quercetin 95% strictly regulates lead (<2.0 ppm), arsenic (<2.0 ppm), cadmium (<1.0 ppm), and mercury (<0.1 ppm), alongside strictly negative pathogen results (salmonella, staphylococcus aureus), fully satisfying USP and EP dietary supplement standards.

Q4: What are the common synergistic ingredients paired with Sophora Japonica Quercetin?

A4: Classic synergistic combinations include Quercetin + Vitamin C (to boost antioxidant stability), Quercetin + Bromelain (to enhance intestinal absorption and anti-inflammatory synergy), and Quercetin + Zinc (to support immune defense).

Q5: What is the shelf life and storage condition of the product?

A5: When stored in a sealed container away from direct sunlight, high heat, and moisture in a cool, dry place, the product has a shelf life of 24 months (2 years). Promptly reseal packaging after opening.

Get in Touch & Request Samples

Interested in our Sophora Japonica Bud Extract Quercetin 95%? Whether you need to request free samples for formula testing, acquire complete MSDS/COA files, or inquire about bulk pricing, please reach out to the Keepingredients team:

• Email: info@keepingredients.com

• WhatsApp: +86 - 13484914978

• Website: www.keepingredients.com