... and quercetin-3'-sulfate. A methyl metabolite of quercetin has been shown in vitro to be more effective than quercetin at ... Quercetin is the aglycone form of a number of other flavonoid glycosides, such as rutin (also known as quercetin-3-O-rutinoside ... In-vitro studies show that quercetin is a strong inhibitor of the cytochrome P450 enzymes CYP3A4 and CYP2C19 and a moderate ... Formica JV, Regelson W (1995). "Review of the biology of quercetin and related bioflavonoids". Food and Chemical Toxicology. 33 ...

... clinical trials have shown improved endothelial function and reduced blood pressure (with a few studies showing inconsistent ... the original bioflavonoids such as quercetin, are also found ubiquitously, but in lesser quantities. The widespread ... This class was the first to be termed bioflavonoids. The terms flavonoid and bioflavonoid have also been more loosely used to ... Flavonoids (or bioflavonoids; from the Latin word flavus, meaning yellow, their color in nature) are a class of polyphenolic ...

... also has been shown to inhibit the act of genetic mutation as exhibited by the Ames test. This test showed that ... and quercetin and is reported to have many of the same functions as these other members of the flavonol class of flavonoids. ... a result not seen from any of the other bioflavonoids tested. Although myricetin has not been concluded to have more than a ... In general, biochemical structural studies have shown that flavonoid structures can tautomerize in biological systems to become ...