<;P>;PROBLEM TO BE SOLVED: To provide a preventive, therapeutic agent, or improving agent of lifestyle-related diseases such as obesity, visceral fat accumulation, hyperlipemia, hyperuricemia, diabetes, and liver disease, containing a component of natural origin. <;P>;SOLUTION: The preventive or improving agent of a lifestyle-related disease includes a thermally coagulated material of a krill squeezed liquid as an active ingredient. This thermally coagulated material contains both protein and lipid derived from krill. Antarctic krill (Euphausia superba) is preferred as krill. The form used as a raw material may be, but is not limited to, a non-heated material or a heated material, but a non-heated material of the Antarctic krill is preferred. <;P>;COPYRIGHT: (C)2011,JPO&INPIT