Patent ID: 7820224

Claim:
A method of preparing oyster flesh extracts, comprising: a reduced-pressure extraction step of putting said raw oyster flesh under a reduced pressure of 0.1 to 0.2 atm in said extractor to extract oyster flesh extracts from said raw oyster flesh in a reduced-pressure state for 30 to 70 minutes, a feed step of extracting oyster flesh extracts from said raw oyster flesh in said reduced-pressure extraction step, and feeding said oyster flesh extracts into an extraction solution in said extractor, a concentration step of concentrating said extraction solution with said oyster flesh extracts fed therein to produce a concentrated solution, a precipitation step of adding an alcohol solution to said concentrated solution to precipitate out said oyster flesh extracts, and a formation step of drying precipitates obtained in said precipitation step into dry oyster flesh extracts.