Quercetin is a botanical extract derived from Sophora japonica bud / onion / apple peel, standardized to Quercetin (pure). With CAS registry number 117-39-5, this ingredient belongs to the Metabolism & Lipid Regulators category of weight management actives. Activates AMPK + suppresses NF-κB (fat oxidation + anti-inflammatory). Unique: inhibits 11β-HSD1 (enzyme converting cortisone→cortisol in adipose tissue), reducing local cortisol that drives visceral fat accumulation. Specifically targets abdominal fat — unique mechanism. As a B2B manufacturer, Shaanxi Baisifu Biological Engineering Co., Ltd. supplies Quercetin in bulk quantities with full Certificate of Analysis (COA), ensuring consistent Quercetin (pure) content and regulatory compliance for dietary supplement, functional food, and nutraceutical applications.
Standard specifications for Quercetin bulk supply from Baisifu:
Activates AMPK + suppresses NF-κB (fat oxidation + anti-inflammatory). Unique: inhibits 11β-HSD1 (enzyme converting cortisone→cortisol in adipose tissue), reducing local cortisol that drives visceral fat accumulation. Specifically targets abdominal fat — unique mechanism.
Level II. Rivera et al. showed significant BMI/waist/triglyceride reduction. Lee confirmed visceral fat-specific effect through 11β-HSD1 inhibition. Best combined with resveratrol — synergistic AMPK/SIRT1.
Very safe ≤1,000 mg/day. FDA GRAS. High doses >2 g/day may cause headache/GI discomfort. Rare kidney damage at >4 g/day. Moderate bioavailability (~2-5%) — phytosome improves this.
Shaanxi Baisifu Biological Engineering Co., Ltd. manufactures and supplies Quercetin (CAS 117-39-5) in bulk quantities for: • Dietary supplement manufacturers (capsules, softgels, tablets, powders)
• Functional food & beverage producers
• Nutraceutical brands seeking Quercetin (pure) standardized ingredient
• Cosmetics companies (anti-cellulite, metabolic support topical) Each batch includes full Certificate of Analysis (COA) with:
• Quercetin (pure) content verification (HPLC/UV)
• Heavy metals, microbial, moisture compliance
• Pesticide residue testing (where applicable)
• Stability data and shelf life confirmation Available forms: powder extract, oil-based softgel fill, microencapsulated powder
Minimum order: 1 kg (sample quantities available)
Lead time: 7–15 business days
Packaging: 25 kg/drum, double-layer PE bag + fiber drum, nitrogen flush available
Q1: Why combined with Resveratrol?
Synergistic SIRT1/AMPK activation. Quercetin also extends resveratrol half-life by inhibiting metabolizing enzymes. 2-3× greater metabolic effect together than alone. Popular premium stack.
Q2: What makes Quercetin unique for abdominal fat?
Inhibits 11β-HSD1, reducing local cortisol production in visceral adipose tissue. Cortisol drives abdominal fat ("stress belly"). Unique mechanism targeting the hormonal driver of visceral fat.
For complementary weight management formulations, consider combining Quercetin with: Resveratrol, Berberine, Curcumin, Green Tea Extract. Multi-ingredient stacks targeting different mechanisms (lipase inhibition, AMPK activation, thermogenesis, appetite suppression) produce synergistic effects superior to single-ingredient products.
About Baisifu: Shaanxi Baisifu Biological Engineering Co., Ltd. (No.69, Jinye Road, Xi'an, 710065, Shaanxi, China | Tel: 0086-29-81110978) is a GMP/ISO-certified manufacturer of botanical extracts, food flavors, amino acids, peptides, and biopesticides with 1,000+ products exported to US/EU B2B markets.
Disclaimer: This content is for informational and B2B product development purposes only. Quercetin (CAS 117-39-5) is a raw ingredient for dietary supplement and functional food formulation, not a finished consumer product. Claims cited are from published research and regulatory approvals — they do not constitute medical advice or guarantee specific outcomes. Consult regulatory experts for target market compliance.
| Parameter | Specification |
|---|---|
| Quercetin | ≥95% |
| Appearance | Yellow-green crystalline powder |
| Solubility | Very limited water/ethanol-soluble |
| Particle Size | 80 mesh |
| Moisture | ≤2% |
| Heavy Metals | ≤10 ppm |
| Assay | 95-105% |
| Melting Point | 314°C |
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