PROCESS FOR PRODUCING PROANTHOCYANIDINE-RICH MATERIAL

摘要

A proanthocyanidine-rich material containing a large amount of highly physiologically active OPC can be efficiently produced by extracting proanthocyanidine from a plant, bringing the obtained extract into contact with chitin, chitosan or derivatives thereof and recovering the unadsorbed matters. Further, a proanthocyanidine-rich material having an elevated OPC content can be produced by treating the proanthocyanidine with a synthetic resin-type adsorbent.