Patent ID: 7507423

Claim:
A method of producing an enriched flavonoid aglycone extract from a plant or plant material containing a flavonoid glycoside and/or conjugate thereof consisting of the following steps: (i). enzymatically converting the plant or plant material, wherein the enzyme converts the flavonoid glycoside or conjugate thereof in the plant or plant material into the flavonoid aglycone; (ii). adjusting the pH to render the flavonoid aglycone soluble and removing the insoluble fraction; and (iii). adjusting the pH to render the soluble flavonoid aglycone relatively insoluble and forming an extract containing the same; wherein the plant material is selected from leaves, petals, sepals, flowers, petrioles, shoots, roots, stems, seeds, pods, tubers, bark, cambium, wood, galls, fruits, vegetables, herbs, ferns, sap, resins, skins, peels, fruit rinds, pomace, wine marc, grain hulls, straw, hay, oil seed cakes, or a combination thereof.