Product
0102
High-Purity Quercetin from Natural Sophora Japonica Extract
Products Description
Derived from Sophora japonica buds, Quercetin powder is a highly purified plant flavonoid with powerful antioxidant and anti-inflammatory properties. As a natural polyphenol, quercetin plays a vital role in supporting immune function, cardiovascular health, and cellular resistance to oxidative stress. Our quercetin powder (≥98%) is extracted using an HPLC-validated clean method to ensure high purity, solubility, and consistency, making it ideal for dietary supplements, functional foods, and cosmetic formulations.
In today’s nutraceutical market, demand for quercetin continues to grow due to growing consumer interest in natural immune boosters and plant-derived bioflavonoids. Compared to synthetic alternatives or lower-grade extracts, our Sophora japonica-based quercetin powder has an extremely stable flavonoid profile with verified residual rutin levels of less than 1.0%, ensuring product consistency and formulation reliability for downstream applications.
We work directly with certified Sophora japonica farmers to ensure batch-to-batch traceability, avoid common adulterations, and provide cleaner products with heavy metal content below 10ppm and solvent residues below ND (non-detectable). We have obtained ISO22000, FSSC22000, HALAL and cGMP certifications to ensure product quality and compliance with relevant regulatory requirements.
In today’s nutraceutical market, demand for quercetin continues to grow due to growing consumer interest in natural immune boosters and plant-derived bioflavonoids. Compared to synthetic alternatives or lower-grade extracts, our Sophora japonica-based quercetin powder has an extremely stable flavonoid profile with verified residual rutin levels of less than 1.0%, ensuring product consistency and formulation reliability for downstream applications.
We work directly with certified Sophora japonica farmers to ensure batch-to-batch traceability, avoid common adulterations, and provide cleaner products with heavy metal content below 10ppm and solvent residues below ND (non-detectable). We have obtained ISO22000, FSSC22000, HALAL and cGMP certifications to ensure product quality and compliance with relevant regulatory requirements.
Why choose our Quercetin Powder (Sophora japonica Extract)?
1. Proven Low Rutin Residue
Unlike many suppliers offering “Quercetin” with high rutin content (>5%), our powder is independently tested to ensure rutin content ≤1.0%, ensuring more consistent pharmacological activity and fewer formulation conflicts.
2. Solubility Enhanced Grinding
We use a proprietary fine grinding technology to improve water dispersibility by approximately 25%, solving the common agglomeration or precipitation issues in beverage and capsule formulations.
3. Batch-to-Batch Consistency
Using a closed-loop extraction system, we maintain the retention of active compounds within ±2.5%, which is much lower than the industry average of ±5-10%. This ensures formulation stability throughout the production cycle.
4. Clean Residue Analysis
Our COA reports consistently show heavy metal content <10ppm, pesticide residues not detected, and solvent residues not detected, exceeding the USP and EU Pharmacopoeia standards for plant extracts.
5. Direct plant origin and full traceability
Our long-term contracts with Shaanxi growers allow us to control harvest time and bud selection, reducing seasonal quality variations. Each batch of products is fully traceable from field to final powder.
Unlike many suppliers offering “Quercetin” with high rutin content (>5%), our powder is independently tested to ensure rutin content ≤1.0%, ensuring more consistent pharmacological activity and fewer formulation conflicts.
2. Solubility Enhanced Grinding
We use a proprietary fine grinding technology to improve water dispersibility by approximately 25%, solving the common agglomeration or precipitation issues in beverage and capsule formulations.
3. Batch-to-Batch Consistency
Using a closed-loop extraction system, we maintain the retention of active compounds within ±2.5%, which is much lower than the industry average of ±5-10%. This ensures formulation stability throughout the production cycle.
4. Clean Residue Analysis
Our COA reports consistently show heavy metal content <10ppm, pesticide residues not detected, and solvent residues not detected, exceeding the USP and EU Pharmacopoeia standards for plant extracts.
5. Direct plant origin and full traceability
Our long-term contracts with Shaanxi growers allow us to control harvest time and bud selection, reducing seasonal quality variations. Each batch of products is fully traceable from field to final powder.
COA
|
Test Parameter |
Specification |
Test Result |
Method |
|
Appearance |
Yellow to light brown powder |
Yellow powder |
Visual Inspection |
|
Purity (HPLC) |
≥98% |
98.5% |
HPLC (High-Performance Liquid Chromatography) |
|
Moisture Content |
≤5% |
4.2% |
Oven Drying Method |
|
Heavy Metals (Lead) |
≤10 ppm |
3.5 ppm |
ICP-MS (Inductively Coupled Plasma Mass Spectrometry) |
|
Heavy Metals (Arsenic) |
≤2 ppm |
1.2 ppm |
ICP-MS |
|
Pesticide Residues |
ND |
ND |
GC-MS (Gas Chromatography-Mass Spectrometry) |
|
Residual Solvents |
ND |
ND |
GC-MS |
|
Rutin Residue |
≤1.0% |
0.8% |
HPLC |
|
Ash Content |
≤5% |
3.3% |
Ashing Method |
|
Solubility |
Soluble in water |
Soluble |
Visual Inspection |
|
Bulk Density |
0.5 - 0.7 g/mL |
0.63 g/mL |
Bulk Density Test |
|
Particle Size |
100% pass 80 mesh |
100% pass 80 mesh |
Sieve Analysis |
|
Total Plate Count |
≤1000 CFU/g |
800 CFU/g |
Plate Count Method |
|
Yeast & Mold Count |
≤100 CFU/g |
50 CFU/g |
Plate Count Method |
|
E. Coli |
Negative |
Negative |
PCR (Polymerase Chain Reaction) |
|
Salmonella |
Negative |
Negative |
PCR |
What is the use of quercetin powder?
1. Anti-Inflammatory Support
Quercetin has powerful anti-inflammatory properties, making it popular in formulas designed to reduce inflammation-related conditions such as arthritis and allergies.
2. Antioxidant Protection
As a powerful antioxidant, quercetin helps fight oxidative stress, supporting overall cellular health, enhancing skin vitality, and slowing aging.
3. Cardiovascular Health
Quercetin supports heart health by improving blood circulation and reducing the risk of heart disease. It is often used in supplements targeting high blood pressure and cholesterol management.
4. Immune System Boost
Quercetin boosts immune response by fighting infection and boosting overall immune function, and is often used in seasonal flu and cold supplements.
5.Allergy Relief
Quercetin is known to inhibit the release of histamine, so it is a common ingredient in supplements that relieve symptoms of hay fever, seasonal allergies, and asthma.
Quercetin has powerful anti-inflammatory properties, making it popular in formulas designed to reduce inflammation-related conditions such as arthritis and allergies.
2. Antioxidant Protection
As a powerful antioxidant, quercetin helps fight oxidative stress, supporting overall cellular health, enhancing skin vitality, and slowing aging.
3. Cardiovascular Health
Quercetin supports heart health by improving blood circulation and reducing the risk of heart disease. It is often used in supplements targeting high blood pressure and cholesterol management.
4. Immune System Boost
Quercetin boosts immune response by fighting infection and boosting overall immune function, and is often used in seasonal flu and cold supplements.
5.Allergy Relief
Quercetin is known to inhibit the release of histamine, so it is a common ingredient in supplements that relieve symptoms of hay fever, seasonal allergies, and asthma.
Recommended Usage & Dosage
1.General Health: 500mg to 1g daily, divided into 1 or 2 doses.
2.Allergy Relief: 1g to 2g per day, particularly during allergy season, in divided doses.
3.Cardiovascular Support: 500mg to 1g per day to support circulation and blood vessel health.
4.Anti-inflammatory: 1g to 1.5g per day, especially for inflammatory conditions.
5.For Immune Support: 500mg to 1g per day, especially during flu season or times of heightened exposure to pathogens.
2.Allergy Relief: 1g to 2g per day, particularly during allergy season, in divided doses.
3.Cardiovascular Support: 500mg to 1g per day to support circulation and blood vessel health.
4.Anti-inflammatory: 1g to 1.5g per day, especially for inflammatory conditions.
5.For Immune Support: 500mg to 1g per day, especially during flu season or times of heightened exposure to pathogens.
Note: Always consult with a healthcare provider to determine the appropriate dosage for individual needs.
Frequently Asked Questions (FAQ)
1. Is quercetin safe for long-term use?
It is generally considered safe to take quercetin at recommended doses for up to 12 weeks. However, long-term or high-dose use should be monitored, especially for people with specific health conditions.
2. Can quercetin be taken with other supplements or medications?
Quercetin is often taken with other antioxidants, such as vitamin C, to enhance absorption and efficacy. However, it may interact with certain medications (e.g., blood thinners, chemotherapy drugs). Always consult a healthcare professional before combining it with other therapies.
3. When is the best time to take quercetin powder?
Quercetin can be taken at any time of the day. However, for optimal absorption, it is recommended to be taken with a meal, especially one that contains fat, as it is fat-soluble.