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 contains a large amount of quercetin.

Like many other bioflavonoids, Quercetin has anti-oxidant, anti-artherogenic, neuroactive, and anti-carcinogenic properties.

Quercetin acts as an antioxidant, neutralizing free radicals—the chemical by-products that harm cell membranes and damage DNA. Available as a dietary supplement, quercetin also possesses antihistamine and anti-inflammatory properties.

There is growing evidence suggesting that quercetin has therapeutic potential for the prevention and treatment of different diseases, including cardiovascular disease, cancer, and neurodegenerative disease. 

In-vitro, Quercetin stabilizes the membranes of mast cells and reduces the release of histamine. Quercetin is similar to that of the RX Chromolyn – prescribed for allergy and asthma prevention.

Quercetin is most commonly taken by mouth to treat conditions of the heart and blood vessels, reduce inflammation, and is used for arthritis, joint pain, headache, allergies, bladder infections, and diabetes.