Natural antioxidant & bioflavonoid

  • Antioxidant
  • Inhibits enzymes responsible for the production of inflammatory mediators and inhibits histamine release
  • Helps prevents symptoms of allergies including itchy eyes, itchy throat, sneezing and nasal congestion
  • Promotes cardiovascular and immune health
  • Pure, high-dose quercetin
  • Citrus-free for those with sensitivities
Gluten Free

Quercetin belongs to the flavonoid class of antioxidants commonly found in apples, onions and citrus fruits. Its use has been widely established, particularly in Europe, for the treatment of a variety of ailments including allergy symptoms, diabetic complications and cardiovascular concerns, all thanks to its anti-inflammatory effects.

Although Quercetin’s main application is for those with allergy symptoms (such as itchy eyes, itchy throat, sneezing and nasal congestion), quercetin also promotes cardiovascular health due to its antioxidant and anti-inflammatory effects. It reduces the oxidation of low density lipoproteins (LDL), promotes healthy blood pressure and blood clotting, enhances nitric oxide (NO) production, and reduces the risk of metabolic syndrome. Quercetin can provide relief from headaches and other types of pain, as it inhibits the production of inflammatory signaling molecules by a mechanism similar to that of aspirin. Quercetin also inhibits the release of histamine from certain immune cells, hence why it is widely used by those who suffer from constant allergies (such as dust) and seasonal allergies (such as hay fever).

AOR Advantage

AOR’s Quercetin is derived from citrus-free sources. AOR offers two sizes of this formula in order to take full advantage of the health benefits offered by this flavonoid powerhouse. Quercetin can add a boost for anyone at risk or suffering from a cardiovascular condition, battling allergies or plagued with headaches.




Quercetin is the flavone aglycone (non-sugar-bound) form of the polyphenolic flavonoid rutin. Quercetin is the major bioflavonoid in the human diet and an antioxidant for the maintenance of good health.


AOR™ guarantees that all ingredients have been declared on the label. Contains no wheat, gluten, corn, nuts, peanuts, sesame seeds, sulphites, mustard, soy, dairy, eggs, fish, shellfish or any animal byproducts.

Adult Dosage

Take one capsule twice daily with food, or as directed by a qualified health care practitioner.


Do not use if you are pregnant or breastfeeding or for use beyond 12 weeks.

Main Applications
  • Cardiovascular health
  • Circulation
  • Cellular growth & differentiation
  • Analgesic properties
  • Antioxidant
  • Blood sugar balance
  • Allergies

The information and product descriptions appearing on this website are for information purposes only, and are not intended to provide or replace medical advice to individuals from a qualified health care professional. Consult with your physician if you have any health concerns, and before initiating any new diet, exercise, supplement, or other lifestyle changes.

Serving Size: One Capsule
500 mg

*Source : Dimorphandra mollis

Non-medicinal Ingredients: microcrystalline cellulose, sodium stearyl fumarate.

Capsule: hypromellose.


Quercetin can also mimic the effects of a calorie-restricted diet which can extend the lifespan in animals and quite likely in humans. A research study carried out in Kentucky demonstrated that brain cells can be protected from beta-amyloid protein toxicity if the cells are pretreated with quercetin, thanks to its antioxidant activities.

Anti-Inflammatory and Anti-Allergy Effects

In 2007, Korean researchers were able to demonstrate how quercetin can reduce the production of inflammatory signaling processes in the body which were associated with chronic inflammatory conditions.

In a study investigating the effects of allergies and pretreatment with quercetin in either oral or inhaled forms of the antioxidant, the animals were protected from having fatal allergic reactions to allergens. Quercetin’s success at preventing food and chemically induced allergies in animals has implications for supporting respiratory disorders in humans. In one study, quercetin outperformed a traditionally used medication for alleviating the symptoms of allergies in guinea pigs. Quercetin was able to reduce airway resistance more that the drug albuterol, and had equal effects in terms of anti-inflammation as the drug cromolym and dexamethasone.

Immune-Modulating Effects

Quercetin is effective in reducing the ability of numerous viruses to replicate. In an Italian study, researchers demonstrated that they could use a quercetin rich extract to up-regulate the antiviral response of the immune system in response to infected cells.

Weight Management

Mice that were fed a high fat diet along with high dose quercetin supplementation gained less weight than the mice not receiving quercetin.

Cardiovascular Health

A British study showed that people who took quercetin supplements supported healthy blood clotting. Cardiologists in Greece were able to demonstrate that a quercetin-rich polyphenol extract was able to improve endothelial health by increasing the flow mediated dilation of major arteries. Another study involving 19 patients with unhealthy blood pressure levels were supplemented with quercetin and had reduced systolic and diastolic blood pressures which corresponded to a lowered risk of vascular disease.

In a study that was released, a longitudinal investigation of risk factors for chronic diseases in elderly men revealed that high intakes of quercetin and other flavonoids predicted lower mortality rates and incidences of heart attack (myocardial infarction). Researchers in the Netherlands believe it is possible that quercetin and other flavonoids reduce risk of heart disease by lowering the formation of oxidized low density lipoprotein (LDL) cholesterol.

Metabolic Syndrome and Blood Sugar Balance

In a 2008 Spanish study involving overweight mice, it was found that quercetin may be protective against metabolic syndrome. When quercetin was given to the mice, the insulin resistant rats had reduced plasma lipids, systolic blood pressure and insulin levels. High doses of the quercetin were able to generate nitric oxide which supports healthy blood vessel function.

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