Flavonoids, by the way, are plant polyphenolics found as the pigments in leaves, barks, rinds, seeds, and flowers-frequently closely associated with Vitamin C and offering synergistic effects.
Flavonoids are also important for human health.
Like vitamins, these compounds are not produced endogenously by the body and must be supplied either through the diet or nutritional supplements. Quercetin has been the subject of dozens of scientific reports over the past 30 years. It has shown the greatest activity among the flavonoids studied in experimental models. Quercetin is frequently used therapeutically in allergic conditions, including asthma and hayfever, eczema, and hives. Additional clinical uses include treatment of gout, pancreatitis and prostatitis, which are also, in part, inflammatory conditions.