PROBLEM TO BE SOLVED: To provide a method for manufacturing an oyster extract, capable of efficiently and simply extracting the oyster extract with effective components such as taurine, glycogen and zinc peculiar to the oyster from the oyster which accumulates fucoxanthin without decomposing the fucoxanthin.SOLUTION: This method for manufacturing an oyster extract includes a process (A) and a process (B): the process (A) of obtaining an extract by extracting from an oyster containing fucoxanthin using a solvent containing ethanol and water at the ethanol/water quantity ratio of 55/45-100/0 under 50°C and the process (B) of solid-liquid separating the extract obtained in the process (A) to obtain an extraction residue and a liquid extract.COPYRIGHT: (C)2013,JPO&INPIT【課題】フコキサンチンを蓄積した牡蠣から、フコキサンチンを分解させることなく、牡蠣特有のタウリン、グリコーゲン、亜鉛などの有効成分とともに、効率的、且つ、簡便に抽出できる、牡蠣エキスの製造方法を提供すること。【解決手段】工程(A)および(B)を含む牡蠣エキスの製造方法:工程(A):フコキサンチンを含有する牡蠣から、エタノールと水とをエタノール/水の量比で55/45~100/0含む溶媒を用いて、50℃未満にて抽出し抽出物を得る工程;および工程(B):工程(A)で得られる抽出物を固液分離して抽出残渣と抽出液を得る工程。【選択図】なし
