Quercetin
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Quercetin Supplements​

Premium Quercetin Powder – Natural Plant Extract for Functional Foods

  1. Product Name: Quercetin Supplements

  2. Specification: ≥98% (HPLC); available in water-soluble and oil-dispersible forms

  3. Appearance: Yellowish-white crystalline powder with a mild characteristic odor

  4. CAS Number: 117-39-5

  5. Lead Time: 3–7 working days

  6. Packaging: 25 kg/drum, 27 drums per tray

  7. Main Markets: Europe, North America, Asia

  8. Key Benefits: Natural flavonoid supporting antioxidant activity, immune health, and wellness formulas

  9. Industry Applications:
    – Dietary Supplements: Immune support, antioxidant capsules, tablets, and powders
    – Functional Foods & Beverages: Fortified drinks, gummies, and nutrition powders
    – Pharmaceutical Raw Material: For antioxidant-focused formulations and research
    – Cosmetics & Skincare: Ingredient for antioxidant and anti-aging products
    – Contract Manufacturing / Private Label: Ready for capsules, powders, or blends

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1. Quercetin Dietary supplements​: The Premier Flavonoid Powerhouse – Final Information & Premium Supply| Supplier & Manufacturer

AIHerba® Quercetin Extract (≥98% HPLC) is a premium bulk botanical ingredient sourced from high-quality Sophora japonica and other standardized natural sources. As a GMP-certified manufacturer and exporter with 28+ years of R&D experience, AIHerba supplies high-purity quercetin powder to nutraceutical, dietary supplement, functional food, and cosmetic industries. Our bulk quercetin is fully traceable, COA-tested, and available for OEM/ODM formulations. Buyers can request samples, access detailed COA and specifications, and place minimum order quantities starting from 1 kg. With ISO, GMP, and third-party lab certifications, AIHerba ensures consistent potency, stability, and compliance for international markets. Our technical team supports custom formulation, regulatory guidance, and optimized usage for applications including health supplements, functional beverages, and skin care products.

2. What is Quercetin

Quercetin is a naturally occurring flavonoid widely found in plants such as apples, onions, and Sophora japonica. It is a potent antioxidant, supporting cellular protection and overall wellness. AIHerba’s quercetin extract is standardized to ≥98% purity, ensuring consistent quality for industrial and consumer applications.

3. Product Source & Origin

  • Botanical Source: Sophora japonica, organic plant materials

  • Origin: Shaanxi Province, China

  • Extraction Method: Water-ethanol extraction, followed by purification and drying to obtain high-purity quercetin powder

  • Quality Standard: GMP-compliant production with ISO22000 and third-party COA verification

4. Mechanism & Key Benefits

  • Antioxidant Support: Quercetin helps neutralize free radicals at the cellular level.

  • Bioavailability Optimization: Micronized and standardized to enhance solubility in functional formulations.

  • Stability: High-purity quercetin ensures consistency in color, potency, and activity.

  • Applications: Ideal for dietary supplements, functional foods, beverages, and cosmetic formulations.

5. Traditional Applications

Quercetin has a long history of use in herbal supplements, functional foods, and cosmetic formulations. Historically, it has been extracted from Japanese pagoda tree flowers (Sophora japonica) and incorporated into natural plant extracts for nutrition, antioxidant properties, and skin care applications.

6. Recommended Dosage & Best Formulation Guidelines

  • Dosage: Industry-standard bulk ingredient; final dosage depends on formulation and regulatory requirements.

  • Suggested Applications:

    • Capsules, tablets, powders: 100–500 mg per serving (based on formulation)

    • Functional beverages: 50–150 mg per serving

    • Cosmetic formulations: 0.1–1% w/w in emulsions or serums

Our technical team provides customized formulation guidance to optimize solubility, stability, and bioavailability.

7. Product Specifications & COA

Parameter Category Item Specification Test Method
Quercetin Content Quercetin ≥ 98% HPLC
Appearance Powder Yellow to light brown Visual / Organoleptic
Solubility Water Practically insoluble Lab Test
Moisture Loss on Drying ≤5% GB/T5009.3
Ash Total Ash ≤1% GB/T5009.4

7.1 Pesticide Residue

Name Limit Test Method
Organochlorine Pesticides ND GC-MS
Organophosphate Pesticides ND GC-MS

7.2 Heavy Metals

Name Limit Test Method
Lead (Pb) ≤2 mg/kg ICP-MS
Arsenic (As) ≤1 mg/kg ICP-MS
Cadmium (Cd) ≤1 mg/kg ICP-MS
Mercury (Hg) ≤0.1 mg/kg ICP-MS

7.3 Microbiological

Name Limit Test Method
Total Plate Count ≤1000 CFU/g AOAC 990.12
Yeast & Mold ≤100 CFU/g AOAC 997.02
E. coli Negative AOAC 2003.01
Salmonella Negative ISO 6579

8. Production Process

  1. Raw material selection and cleaning

  2. Water-ethanol extraction

  3. Filtration and concentration

  4. Purification & crystallization

  5. Drying and micronization

  6. Packaging under GMP conditions

  7. COA and quality testing

9. Storage, Shelf Life & Packaging

  • Storage: Store in a cool, dry, and dark environment

  • Shelf Life: 24 months in sealed containers

  • Packaging: 1 kg, 5 kg, 10 kg, or customized packaging options

10. Sample Policy, Shipping & MOQ

  • Sample Availability: Yes, free or paid samples available

  • Shipping Methods: Air, sea, or express courier

  • Minimum Order Quantity: 1 kg

  • Delivery Time: 7–15 days depending on destination and order volume

11. Clinical Data & Research References

All references used are scientific and regulatory sources to enhance credibility.

12. Applicable Industries & Use Cases

  • Nutraceuticals & dietary supplements

  • Functional foods & beverages

  • Cosmetic and personal care formulations

  • Pharmaceutical intermediate ingredients

13. Usage Instructions

  • Mix quercetin powder uniformly in final formulations

  • Avoid excessive heat and direct sunlight during processing

  • Follow local regulatory limits for labeling and dosing

14. Factory Expertise & Brand Authority

  • 28+ years of extraction and production experience

  • GMP, ISO, and third-party lab certifications

  • OEM/ODM services for customized formulations

  • Full traceability and COA for every batch

15. FAQ (6 Questions)

  1. Q: What is the purity of your quercetin extract?
    A: ≥98% HPLC tested, batch COA provided.

  2. Q: Can you provide a sample for testing?
    A: Yes, samples are available for evaluation and formulation testing.

  3. Q: What industries use AIHerba quercetin?
    A: Nutraceuticals, dietary supplements, functional foods, beverages, cosmetics.

  4. Q: Do you provide OEM/ODM services?
    A: Yes, customized formulations and labeling are available.

  5. Q: How is the quercetin tested for quality?
    A: COA includes purity, heavy metals, pesticide residues, and microbiological tests.

  6. Q: What is the MOQ and delivery time?
    A: MOQ starts from 1 kg, delivery 7–15 days depending on order volume.

16. Contact & Verification

AIHerba® | China Natural Plant Extracts Supplier & OEM Factory

Factory Strength: Real production images, ISO/GMP certificates, and full traceability available for verification.

17. References

  1. PubMed – Antioxidant Effects of Quercetin: https://pubmed.ncbi.nlm.nih.gov/?term=quercetin+antioxidant

  2. NIH Office of Dietary Supplements: https://ods.od.nih.gov/factsheets/Quercetin-HealthProfessional/

  3. FDA – Dietary Supplement Guidance: https://www.fda.gov/food/dietary-supplements

  4. EFSA Scientific Opinions – Quercetin Safety & Use: https://www.efsa.europa.eu/en/search/site/quercetin

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