AMYLOID β FIBRIL DECOMPOSING AGENT AND THERAPEUTIC OR PREVENTIVE AGENT AND THERAPEUTIC OR PREVENTIVE FOOD COMPOSITION FOR DISEASES CAUSED BY AMYLOID β FIBRIL FORMATION
An object of the present invention is to provide: an amyloid fibril decomposing agent containing a natural product as an active ingredient a therapeutic or preventive agent for a disease caused by amyloid fibril formation and a therapeutic or preventive food composition for a disease caused by amyloid fibril formation. Provided are: an amyloid fibril decomposing agent containing a dry powder ground product and/or extract of an earthworm as an active ingredient a therapeutic or preventive agent for a disease caused by amyloid fibril formation and a therapeutic or preventive food composition for a disease caused by amyloid fibril formation. The disease caused by amyloid fibril formation is preferably Alzheimers disease.