Patent attributes
The method for producing proanthocyanidin-containing product of the present invention comprises the steps of providing a pine bark as a starting material, extracting the pine bark with at least one of water and an organic solvent, and treating the resultant extract with a synthetic resin adsorbent, wherein the pine bark has characteristics in that at least 7 wt % of solid material in terms of dry weight is obtained from a pine bark extract that is obtained by adding 10 parts by volume of an aqueous ethanol solution containing ethanol in the range of 50 to 80 volume % to one part by weight of the pine bark, and performing extraction at 80 to 85° C. for one hour. It is possible to conveniently and efficiently obtain proanthocyanidin-containing product that contains at least 10 wt % of OPCs.
