Quercetin, a water-soluble plant pigment, is part of a family of natural compounds called Bioflavonoids found in fruits and vegetables, but highest levels are found in apples and onions. People use quercetin as medicine.
Quercetin is a flavonoid antioxidant found in pigmented fruits and vegetables. Berries, onions, grapes and apples all provide good dietary sources of quercetin.
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ANALYSIS |
SPECIFICATION |
RESULTS |
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Assay |
≥98％ |
98.06% HPLC |
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Organoleptic |
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Appearance |
Yellow Powder |
Complies |
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Odor |
Characteristic |
Complies |
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Taste |
Characteristic |
Complies |
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Physical Characteristics |
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Lose on drying |
≤12% |
Complies |
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Sulphated ash |
≤0.3% |
Complies |
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Residual Solvent |
≤0.5% |
Complies |
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Particle size |
95% through 80 mesh |
Complies |
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Melting point |
305-315℃ |
310℃ |
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Identification |
Must positive |
Complies |
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Heavy Metal |
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Heavy Metal |
≤10ppm |
Complies |
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Lead(Pb) |
≤2ppm |
Complies |
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Arsenic(As) |
≤2ppm |
Complies |
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Microbiological Tests |
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Total Plate Count |
≤5000cfu/g |
Complies |
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Total Yeast & Mold |
≤300cfu/g |
Complies |
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E.Coli |
Negative |
Negative |
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Salmonella |
Negative |
Negative |
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Staphylococcus |
Negative |
Negative |
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1. Prostatitis
Quercetin has anti-inflammatory and antioxidant effects and may reduce pain and inflammation of the prostate.
Recommended Dosage —— 1,000 mg per day
2. Hypertension
Studies show that quercetin supplementation reduces blood pressure in people who have mild high blood pressure.
Recommended Dosage —— 730mg quercetin in two divided doses
3. Exercise-induced respiratory infections
In one study, prolonged (over a week at minimum) supplementation of quercetin significantly reduces the number of upper respiratory tract infections in cycling athletes following intensive exercise.
Recommended Dosage —— For athletes who will have intensive exercise, 500 mg twice a day, beginning three weeks before and continuing for two weeks after.
4. Allergies and Sensitivities
Many of the effects of allergic reactions are caused by the release of histamine, chemicals that cause allergic reactions. In test tubes, quercetin prevents immune cells from releasing histamines. On that basis, researchers think that quercetin may help reduce symptoms of allergies, including runny nose, watery eyes, hives, and swelling of the face and lips. However, there is no evidence yet that it works in humans.
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Due to the complexity of plant extract and the deficiency industrial standards, one of our founders established a professional testing lab with an investment of 15 million RMB in 2014. The laboratory is equipped with five High performance liquid chromatography, one Gas Chromatograph, one Atomic Absorption Spectrometer, one Liquid mass spectrometry, one TLC scanner, one Automatic polarimeter, one Infrared Spectrometer, one Automatic melting point apparatus, one Mold incubator, one UV-visible spectrophotometer, one Portable Pressure Steam Sterilizer, one Single clean bench, one Explorer quasi-microbalance, one Electronic balance, and one Experimental resistance furnace.
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