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US 6,238,673 B1Granted
Method of producing high flavonol content polyphenol compositions
AssigneeThe Howard Foundation
InventorAlan Norman Howard
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Abstract
Disclosed is a method of producing a polyphenol-containing composition derived from grapes, the method including: preparing a liquid grape extract which includes polyphenols; contacting the liquid extract with a separation medium which fractionates the components of the extract; and recovering that fraction in which the polyphenols are present. Also disclosed is a method of enriching the composition with added flavonol.
Claims20
A method of producing a dry polyphenol containing composition comprising flavonols and anthocyanins for human consumption comprising:
- a) using a grape extract wherein said extract contains sufficient flavonols to yield at least 1% w/dry wt flavonols;
- b) applying said grape extract to a solid chromatographic separation medium which retains polyphenols;
- c) eluting material from the separation medium with a liquid eluent acceptable for the preparation of foods;
- d) recovering a fraction in which the polyphenols are present, wherein said recovered polyphenol fraction comprise at least 25% w/dry wt polyphenols and 1% w/dry wt flavonols and about 1% w/dry wt anthocyanins;
- e) drying the recovered polyphenol fraction.
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Dependencies are inferred from the claim text.