1. Product name:Quercetin
2. Active ingredient:Quercetin
3. Botanical source:Sophora japonica L.
4. Biogenic origin:Wild in central and southern China
5. CAS NO.:117-39-5
6. Specification: 98% Quercetin
7. Molecular formula:C15H10O7
9. Characters:Yellow fine powder
10. Solubility:hardly soluble in ethanol, insoluble in cold water etc.
11. Usage:Pharmaceuticals, healthcares
Part of the Plant
Country of Origin
Water and ethyl alcohol
Particle Size (80 mesh)
AOAC 942.05, 18th
Total Heavy Metals
USP <231>, method II
AOAC 986.15, 18th
AOAC 986.15, 18th
AOAC 971.21, 18th
Total Plate Count
AOAC 990.12, 18th
Total Yeast & Mold
FDA (BAM) Chapter 18, 8th Ed.
AOAC 997.11, 18th
FDA (BAM) Chapter 5, 8th Ed.
Possibly Effective for:
Prostate pain and swelling (inflammation). Taking quercetin by mouth seems to reduce pain and improve quality of life, but doesn’t seem to help urination problems in men with ongoing prostate problems that aren’t due to infection.
Insufficient Evidence for:
Heart disease. Limited research suggests that increasing dietary intake of quercetin might help prevent heart disease death in elderly men.
High cholesterol. Short-term use of quercetin supplements does not seem to lower “bad cholesterol” (low-density lipoprotein (LDL) cholesterol), lower total cholesterol, or raise “good cholesterol” (high-density lipoprotein (HDL) cholesterol).
High blood pressure. Some research suggest that 365mg of quercetin aglycone twice daily produces a small (5-7 mmHg) decrease in blood pressure in people with untreated, mild high blood pressure. It’s not known yet how important this is.
Exercise-induced respiratory infections. Developing research shows that taking 500 mg of quercetin twice daily for 3 weeks before, and continuing during 3 days of extended, intense cycling reduces the number of upper respiratory infections in the 14 days following the heavy exercise.
Kidney transplantation. Some research suggests that a combination of 20 mg of quercetin and 480 mg of curcumin taken once or twice daily, starting within 24 hours of kidney transplantation and continuing for one month, in combination with anti-rejection drugs, improves early function of the transplanted kidney.
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