quercitin

1. (organic chemistry) A flavonoid found in fruits, vegetables, leaves and grains.Examples: "Quercitin-β-glucoside is more easily absorbed than the aglycone quercitin. Isorhamnetin-β-glucoside, which is chemically similar to quercitin, differing only by a single methoxyl group, is more readily absorbed."; "Here again the consumption of a bioflavonoid (quercitin) was related to the incidence of CAD mortality. It was found that men who consumed (from the diet) less than 10 mg per day of quercitin had a 200% increase in the CAD death rate, compared to those who consumed more than 30 mg."; "In the case of the flavanol quercitin, the absorption spectrum of quercitin itself was red-shifted and its fluorescence intensity increased, while the fluorescence intensity of albumin was quenched."uncountable