Patent ID: 6841171

Claim:
A method of preparing a free-radical scavenging composition, comprising hydrolyzing oyster flesh using a protease to obtain an enzymatic oyster hydrolysate, wherein the hydrolysate is obtained using a method comprising the following steps: a) grinding predrained oyster flesh, b) diluting the ground material in water, at a ground material/water ratio of between 30/70 and 70/30 (m/v), c) hydrolyzing the ground material thus diluted with subtilisin at a pH of approximately, 8 and at a temperature of approximately 60° C. for a period of time sufficient for the hydrolysate to exhibit a degree of protein hydrolysis at least equal to 50%, d) stopping the hydrolysis by inactivation of the subtilisin, and e) collecting the liquid phase of the hydrolysate.