Quercetin (Sophora japonica Flower Bud Extract) Powder – Rutin-Rich Extract (Sophora japonica)

This quercetin is obtained from the flower buds of the Japanese pagoda tree, typically by hydrolysis of naturally occurring rutin. Quercetin is a flavonol widely used for antioxidant support and seasonal wellness, often combined with vitamin C or bromelain.

Supplied as a standardized botanical extract powder with a declared marker-compound assay for batch-to-batch consistency.

GUTINS Quercetin-rich Sophora Extract — rutin-rich extract is offered for manufacturers, formulators and brands. Specification: rutin-rich extract; form / technology: Standardized extract; diet suitability: Plant-based.

Product Specifications

Key Benefits

• High-purity plant-derived flavonol
• Supports healthy immune and seasonal respiratory function
• Provides antioxidant support against oxidative stress
• Supports healthy histamine balance
• Supports cardiovascular and vascular health

Uses & Applications

Typical applications: Antioxidant.

• Quercetin capsules and tablets
• Quercetin + bromelain formulas
• Immune and seasonal support blends
• Zinc ionophore-style immune complexes
• Senolytic and healthy aging formulas
• Sports recovery blends

How to Use / Dosage

• Typical daily intake: 250-1,000 mg/day of quercetin
• Typical use level: 10-60% in capsule and tablet fills; 0.05-0.5% in beverages (with solubilizers)
• Formulation tip: Standardized extracts are best dosed on the basis of the marker assay stated on the CoA.
• Weigh accurately and pre-blend small quantities with a carrier (e.g. maltodextrin, MCC or rice flour) for uniform distribution.
• Final dosage should be based on the lot-specific Certificate of Analysis, the target serving size and the rules of your destination market.

Solubility & Formulation

Practically insoluble in cold water; soluble in ethanol and alkaline solutions; poorly soluble in oils

Storage & Handling

Store tightly closed in a cool, dry place protected from light.. Keep container tightly closed; use clean, dry utensils. Shelf life is typically 24 months in unopened original packaging (see CoA).

Regulatory Note

Quercetin is sold as a dietary ingredient in the US (high-purity quercetin has GRAS notices). In the EU it is used in food supplements; verify national limits and claims.

Diet suitability: Plant-based. This product is supplied as a raw ingredient for further manufacturing and is not a finished consumer product. The buyer is responsible for ensuring the ingredient, its use level and all label claims comply with the regulations of the destination market (e.g. FDA, EFSA, FSSAI, Health Canada, TGA).

Caution & Disclaimer

• May inhibit CYP enzymes and P-glycoprotein; review use with prescription medicines
• High doses may affect kidney function; avoid long-term very high intakes
• May interact with anticoagulants and some antibiotics (quinolones)
• Not recommended during pregnancy and lactation without advice
• Low oral bioavailability; bright yellow powder may stain

For manufacturing, formulation and professional use only. Not for direct consumption in concentrated form. Keep out of reach of children. Avoid inhalation of dust and contact with eyes; use suitable PPE when handling. Consult a qualified healthcare professional before use if pregnant, nursing, taking medication or managing a medical condition. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Bulk & Wholesale Orders

Need more than 5 Kg, a custom specification, private label support or documentation (CoA, TDS, SDS, allergen and GMO statements)? Contact the GUTINS team for bulk pricing and lead times.