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Supply informations:
  • Price: $3 - $89/KG
  • Active ingredient: Quercetin , Quercetin
  • Number of suppliers: 7
  • Number of supply informations: 8

What is Quercetin

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What is Quercetin?

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 a potent antioxidant and has anti-inflammatory activity, protecting cellular structures and blood vessels from the damaging effects of free radicals. It improves blood vessel strength. Quercetin inhibits the activity of catechol-O-methyltransferase that breaks down the neurotransmitter norepinephrine. This effect may lead to elevate the levels of norepinephrine and an increase in energy expenditure and fat oxidation. It also means quercetin acts as an antihistamine leading to the relief of allergies and asthma. As an antioxidant, it reduces LDL cholesterol and offers protection from heart disease.

Quercetin benefits:


  1. It has good expectorant, cough effect, and some asthma, for the treatment of chronic bronchitis.
  2. It can lower blood pressure, fragility, blood fat, expanse coronary artery, and increase capillary resistance coronary blood flow, and other effects on the coronary heart disease and hypertension role of adjuvant therapy.
  3. It can be anti-tumor and anti-platelet aggregation.
  4. It can inhibit platelet aggregate reduce capillaryon and 5 - hydroxytryptamine (5-HT) release.


How Quercetin works:

Quercetin has antioxidant and anti-inflammatory effects which might help reduce prostate inflammation.

Quercetin Dosage:

For prostate pain and swelling (prostatitis): 500 mg twice daily.

Quercetin Precautions:

Quercetin is possibly safe for most people when taken by mouth short-term. Quercetin has been safely used in amounts up to 500 mg twice daily for 12 weeks. It is not known if longer-term use or larger amounts are safe.
Quercetin can cause headache and tingling of the arms and legs. Very high doses might cause kidney damage.

Where to buy Quercetin?

If you want to buy capsule products, please select the Amazon. If you want to buy extract powder, please choose us. More detailed information about the high-quality suppliers, please click herewww.best-dietary-supplements.com

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I love this for my seasonal allergies. I have been using it since the late 90s. It has allowed me to almost completely get off of OTC allergy medicine, not that it worked that well. I start a few weeks before the trees start in my area and use it ...
2015-08-07 02:48:35
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Started take this supplement for Asthma and severe allergies. After two doses, virtually all of my chronic allergy and asthma symptoms are GONE. I had been using my Ventloin inhaler 10 to 20 times per day. I now use 2 to 4 times per day. I had not...
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Bought this product about 3 months ago with the hopes of improving my nasal congestion and eye itchiness. Wasn't sure the quercetin was helping ... until I forgot to take it one day! Now definitely know that it helps! Would recommend to try for an...
2015-08-06 11:23:23
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I suffer from recurring gout. My latests bout was in the knuckles of my right hand making it impossible to use.I learned about Quercetin and ordered a bottle. Within 3 days the swelling and pain were greatly reduced and I now have full use again.
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I had asthma bad at one time being hospitalized at least 3 to 4 times a year. All the meds they prescribed helped in the short term, but had many bad side effects. I use to feel like it was worth the risk when the alternative certainly meant a hos...
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