1. Product name: Apple Guava Extract
2. Active ingredient: Quercetin
3. Botanical source: Psidium guajavaL.
4. Biogenic origin: Southern China
5. Specification: 10% Quercetin
6. Characters: Brown-yellow powder
7. Solubility: Soluble in Ethanol, partly soluble in water
8. Usage: Pharmaceutical and health food
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.
Quercetin is a plant pigment (flavonoid). It is found in many plants and foods, such as red wine, onions, green tea, apples, berries, Ginkgo biloba, St. John's wort, American elder, and others. Buckwheat tea has a large amount of quercetin. People use quercetin as a medicine.
Quercetin is used for treating conditions of the heart and blood vessels including “hardening of the arteries” (atherosclerosis), high cholesterol, heart disease, and circulation problems. It is also used for diabetes, cataracts, hay fever, peptic ulcer,schizophrenia, inflammation, asthma, gout, viral infections, chronic fatigue syndrome (CFS), preventing cancer, and for treating chronic infections of the prostate. Quercetin is also used to increase endurance and improve athletic performance.
How does it work?
Quercetin has antioxidant and anti-inflammatory effects which might help reduce prostate inflammation.
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.
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