Flavonols (with an "o") are a class of flavonoids that use the 3-hydroxyflavone backbone (3-hydroxy-2-phenylchromen-4-one (IUPAC)). Their diversity stems from the different positions the phenolic -OH groups. They're distinct from flavanols (with an "a"), another class of flavonoids. Flavonols are present in a wide variety of fruits and vegetables. In Western populations, estimated daily intake's in the range of 20-50 mg per day for flavonols. Individual intake varies depending on the type of die… (More on Flavonol)