It has powerful antioxidant, anti-histamine, and anti-inflammatory action. Research has shown it to be useful for allergic conditions, asthma,
hay fever, rheumatoid arthritis, and lupus. It is also used in diabetes and cancer.
Quercetin inhibits the production and release of histamine and other allergic/inflammatory substances. Histamine is a substance that is responsible for the allergic symptoms in the body.