As for production method of professional anthocyanidin content ones of this invention, when at 80 - the 85C 1 hours extracting vis-a-vis the pine bark 1 mass section, 50 - 80 capacity % including the ethanol aqueous solution 10 capacity section, with dry mass conversion 7 mass % the pine bark where you can obtain the solid above is designated as the starting raw materials, the said pine bark the process which the inside of the water and the organic solvent extracts at least in 1 kinds, and the process which processes the said extract with the plastic adsorbent are included. With the production method of this invention, 10 mass % above professional anthocyanidin content ones which are contained the simplicity and can obtain OPC efficiently.本発明のプロアントシアニジン含有物の製造方法は、松樹皮1質量部に対して、50~80容量%のエタノール水溶液10容量部を加えて80~85℃にて1時間抽出したときに、乾燥質量換算で7質量%以上の固形物が得られる松樹皮を出発原料とし、該松樹皮を水および有機溶媒のうちの少なくとも1種で抽出する工程、および該抽出物を合成樹脂系吸着剤で処理する工程を包含する。本発明の製造方法によって、OPCを10質量%以上含有するプロアントシアニジン含有物が簡便かつ効率よく得られる。
