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Unlocking the Power of Quercetin in Modern Immunomodulation

A Comprehensive Industry Whitepaper on Sourcing, Formulating, and Market Evolution

Information Gain Insight: Quercetin, a potent plant-derived flavonol found in high concentrations in red onions, apples, and premium Sophora japonica L., has evolved from a niche antioxidant into a foundational pillar of global respiratory and cellular defense formulations. By stabilizing mast cells and acting as an ionophore to facilitate zinc absorption, Quercetin has established itself as the leading ingredient for next-generation immune support complexes.

The Role of Quercetin in Immune Pathways & Synergistic Matrixes

From a cellular perspective, Quercetin acts as a natural inhibitor of inflammatory cytokines. It regulates the NF-κB pathway, which directly governs the transcription of inflammatory mediators. More importantly, research indicates that Quercetin functions as a zinc ionophore. Zinc is vital for inhibiting viral RNA polymerase within cells, but it cannot cross lipid bilayers easily. When formulated synergistically with Zinc, Vitamin C, and Bromelain, Quercetin assists the movement of Zinc across the cell membrane, maximizing immune efficacy.

For formulators targeting global markets, understanding the distinction between Quercetin Dihydrate and Quercetin Anhydrous is critical. Quercetin Dihydrate contains two water molecules bound to its crystalline structure and is commonly selected for solid dosage forms like tablets and standard capsules. Quercetin Anhydrous, with water removed, delivers higher active concentration per unit weight and is frequently used in premium, high-density powder formulations or oil-infused liquid capsules.

Why Sourcing from China Factories Provides Unmatched Advantages

China represents the largest and most technologically advanced supplier region for botanical flavonoids globally, specifically due to the abundance of natural *Sophora japonica* (Japanese Pagoda Tree) crops, which serve as the primary organic source of Rutin—the direct precursor for high-yield Quercetin extraction.

1. **Raw Material Control & Abundance:** The geographical clusters in Sichuan and surrounding mountainous regions provide direct access to high-purity Sophora japonica harvests. Processing at the source reduces transit time, preserving active bio-flavonoid integrity.

2. **Advanced Chromatography & Extraction Tech:** China-based factories like Chenlv Herb employ modern hydro-alcoholic extraction techniques and precise crystallization chromatography. This enables the isolation of Quercetin at 95% and 98% purity levels by HPLC, while keeping solvent residues well below the stringent USP/EP limits.

3. **Cost-Effectiveness at Scale:** High-efficiency production plants process metric tons of biomass daily. The scale economy allows manufacturers to offer highly competitive pricing indexes compared to Western processing plants, without compromising batch consistency.

About Chengdu Chenlv Herb Co., Ltd.

Chengdu Chenlv Herb Co., Ltd. (Chenlv Herb) was established in 2012 as a state-of-the-art, high-tech enterprise specializing in the research, development, extraction, and global distribution of botanical extracts and natural active pharmaceutical ingredients (APIs).

We are committed to supplying high-purity, highly active, and premium-quality raw materials that cater to the demanding needs of the global pharmaceuticals, nutraceuticals, food supplement, functional cosmetics, and premium animal nutrition industries. With a strong R&D team composed of phytochemists and analytical scientists, we guarantee full transparency, traceabilty, and regulatory compliance from raw crop cultivation to finished active ingredients.

Corporate Milestones

Our milestones show steady, organic growth built on client trust, technological precision, and strict compliance with health standards globally.

2012
Established In Chengdu, China - Pioneering Standardized Herb Extractions

Chenlv Herb focuses on providing customized specifications to fit specific formulation requests, backed by strict in-house laboratory controls using HPLC, GC-MS, and ICP-MS testing equipment.

8+
Years of Deep Ingredient Production
2711 ㎡
Factory & R&D Center Area
3+
Core R&D Leadership / Advisers
10+
Major Standardized Active Products
17+
Global Cooperative Clients
1+
Certified Factory Base

Our Core Technological Advantages

Why procurement teams and formulators choose Chenlv Herb as their strategic manufacturing partner

Innovative R&D

Creative custom extraction designs and phytochemically balanced active matrixes that elevate your finished supplement brands.

High Efficiency

Eco-friendly packaging aligned with modern environmental values. Optimized extraction cycles ensure fast project turnaround.

Sustainable Extraction

End-to-end green extraction methods and botanical packaging solutions that minimize ecological footprint.

Dedicated Service

Fast logistical response, dedicated accounts support, and complete transparent documentation to match your target timeline.

Quality Assurance

Strict internal QA/QC systems monitoring heavy metals, pesticide residues, assay levels, and microbiological criteria.

Rich Experience

Decades of aggregated team expertise in phytochemistry, guaranteeing precise formulation compatibility and longevity.

Global Applications of Standardized Plant Extracts

Pioneering functional, natural, and safe active compounds across vital industries worldwide

Health Care

Health Care & Nutraceuticals

Driven by the modern concept of "homology of medicine and food", our high-purity extracts serve as core raw materials for natural dietary supplements.

Pharmaceutical

Pharmaceutical Industry

From herbal formulas recorded in ancient classics to modern botanical drugs, our extracts offer active target compounds with clear pharmacological effects.

Cosmetics

Cosmetics & Skincare

Providing natural, gentle antioxidant, and anti-inflammatory properties to meet consumer demand for biocompatible skincare ingredients.

Animal Nutrition

Animal Nutrition & Feeds

Improving biological immunity, production yield, and overall gut integrity of livestock as natural alternatives to synthetic antibiotics.

Global Enterprise Procurement Dynamics & Pricelist

Key financial metrics and procurement guidelines for Quercetin and related immune ingredients

When evaluating global raw ingredient prices, professional buyers look beyond simple unit costs. True value calculations require looking at standardized extraction yields, active ingredient assays, heavy metal profiles, and packaging methods. For example, standard *Quercetin Dihydrate 95% (HPLC)* from China factories acts as a global pricing baseline. Custom modifications—such as micro-milling, granular formulations, liposomal delivery systems, or special certification batches (USDA Organic, Kosher, Halal)—will affect the final price index.

Ingredient Name Standard Specification Key Sourcing Precursor / Method Est. Price Range (USD/kg FOB China) Recommended Applications
Quercetin Dihydrate 95% by HPLC (Powder) Sophora japonica extraction $35.00 - $55.00 Dietary supplements, standard capsules
Quercetin Anhydrous 98% by HPLC Dehydration of Dihydrate form $55.00 - $80.00 High-density formulations, liquids
Rutin NF11/DAB10 95% by UV / HPLC Raw Sophora japonica extract $22.00 - $35.00 Quercetin synthesis, vascular health
Fisetin 98% by HPLC Cotinus coggygria extract $400.00 - $650.00 Anti-aging formulas, cognitive booster
Hesperidin 90% - 95% by HPLC Citrus aurantium extract $18.00 - $30.00 Synergistic immune blends, vitamin C base
Dihydroberberine 98% by HPLC Synthetic conversion from Berberine $280.00 - $420.00 Metabolic immune defense, glucose control

*Disclaimer: The above prices reflect historical market averages for bulk orders (100kg+). Prices vary depending on raw material harvest levels, energy costs, and shipping demands. Contact our sales department for a precise real-time quotation.

One-Stop Contract Customization Process

How we ensure complete batch consistency and precision throughout our supply chain

01

Cooperation Intention

Initial alignment call to define physical and chemical ingredient specifications.

02

Detailed Quotation

Providing a commercial quote and technical data sheets based on target quantities.

03

Contract Signing

Signing our supply contract to lock in batch parameters, pricing, and shipping dates.

04

Demand Customization

Laboratory prototype creation and validation testing to confirm formulation parameters.

05

Volume Production

Full production run within our ISO-certified facilities under strict batch controls.

06

Quality Inspection

Comprehensive third-party and internal testing, culminating in a Certificate of Analysis (CoA).

07

Factory Shipment

Secure packing and logistics processing to guarantee safe delivery to your warehouse.

Certified Production Excellence

Our extraction facilities comply with safety regulations across all global markets

Chengdu Chenlv Herb is fully audited and certified by leading global compliance systems. We guarantee our batch files are ready for FDA, EFSA, and regional health authority registration.

ISO Certification 1
ISO Certification 2
Kosher Certification
Halal Certification
FDA Facility Audit Document
Quality Analysis standard sheet

Latest Industry News & Regulatory Updates

Keeping you updated on market supply dynamics, pricing spikes, and formulation breakthroughs

Citrus aurantium market outlook

The price of Citrus aurantium raw material rises, what is the market prospect of extract?

Recently, the market price of Citrus aurantium raw materials in China has been on the rise, drawing significant attention from the industry. As the new production season (May-June) comes to an end and new supplies gradually enter the market, price fluctuations have become a focal point due to supply and demand dynamics and cost considerations.

May 28, 2025
Chenlv Herb CPHI China

Chengdu Chenlv Herb sincerely invites colleagues in the industry to explore new opportunities of plant extraction at 2025 CPHI China

As a 'calling card' for leading China's pharmaceutical industry onto the global stage, the 23rd China Pharmaceutical Raw Materials Exhibition (CPHI China 2025) will join hands with the 18th China Pharmaceutical Machinery to present the future of extraction technology.

May 28, 2025
API conference invitation

Chengdu ChenLv Herb sincerely invites you to attend the 92nd API conference and start a new chapter of biotechnology together

Join our core extraction research team at the 92nd API conference to discuss custom solutions for bioflavonoids, andrographolide, and next-generation immunomodulator ingredients.

May 25, 2025

Sourcing FAQ: Quercetin and Bioflavonoids

Addressing core technical questions from procurement officers, product managers, and formulation experts

What is the primary botanical source of your Quercetin?
Our Quercetin is derived from the dried flower buds of *Sophora japonica* L. (Japanese Pagoda Tree), which yields a high concentration of the glycoside Rutin. This Rutin is then hydro-lyzed to produce high-purity Quercetin Dihydrate or Quercetin Anhydrous.
How do you control solvent residues and heavy metal contaminants?
We use water and food-grade ethanol as extraction solvents. The residual solvent profile is strictly monitored via Gas Chromatography (GC) to ensure it complies with USP <467> and European Pharmacopoeia (EP) guidelines. Heavy metal profiles (Lead, Arsenic, Cadmium, and Mercury) are tested using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and meet global import regulations.
What is the shelf life and storage protocol for bulk Quercetin?
Standard bulk Quercetin has a shelf life of 36 months from the date of manufacture if stored in the original, unopened double plastic bags inside fiber drums. Store in a cool, dry area away from direct light and heat sources to prevent oxidation.
Do you provide custom particle sizes for capsule or tablet manufacturing?
Yes, we offer micro-milling services. Our standard powder is 80 mesh, but we can customize the particle size up to 200 mesh (ultrafine) for formulation compatibility, capsule filling, or instant water-soluble drink mixes.
How does Rutin differ from Quercetin in formulation?
Rutin is a rutinose glycoside of Quercetin. It has lower bioavailability than free Quercetin but offers excellent cardiovascular benefits and vascular wall strengthening properties. Quercetin is the aglycone (without the sugar moiety) and exhibits more direct immunomodulatory, anti-histamine, and zinc ionophore properties.

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