ingredient information
Flavonoids (or bioflavonoids) (from the Latin word flavus meaning yellow, their colour in nature), are a class of plant secondary metabolites. Flavonoids were originally referred to as Vitamin P, likely due to the effect they had on the permeability of vascular capillaries, but this term is rarely used now. [1] According to the IUPAC nomenclature,[2] they can be classified into: flavonoids, derived from 2-phenylchromen-4-one (2-phenyl-1,4-benzopyrone) structure (examples: quercetin, rutin). isoflavonoids, derived from 3-phenylchromen-4-one (3-phenyl-1,4-benzopyrone) structure neoflavonoids, derived from 4-phenylcoumarine (4-phenyl-1,2-benzopyrone) structure.