Quercetin

Quercetin belongs to a group of polyphenolic substances known as flavonoids that have antioxidant, anti-inflammatory, antiviral, Immunomodulatory, anticancer and gastro-protective activities.
Animal studies have shown that quercetin inhibits the degranulation of mast cells, basophiles and neutrophils, which lends credence to its anti-inflammatory, anti-allergy and immunomodulating activities.
Additional studies suggest that quercetin inhibits tyrosine kinase and nitric oxide synthase and that it modulates the activity of the inflammatory mediator NF-Kappa B.