Patent ID: 7763292

Claim:
A process of making a black bean extract which comprises: (a) extracting a mixture of compounds from the black bean or hulls of the black bean with a polar solvent system consisting essentially of (i) one or more C 1 -C 6 alcohol or (ii) water and a C 1 -C 6 -alcohol, (b) subjecting the mixture of compounds from extracting step (a) to a chromatographic separation step which comprises of a first elution step, wherein a first fraction is obtained, and a second elution step, wherein a second fraction, which is the isolated black bean extract, is obtained, wherein: (i) the first fraction has less flavonols, flavones and isoflavones than the second fraction; (ii) the first fraction also contains phenolic acids and other water soluble compounds; and (iii) the second fraction contains flavonols, isoflavones, anthocyanins and a compound with a mass spectral ion peak of 981 Daltons.