An agent for protecting upper respiratory tracts or a food or drink composition for protecting upper respiratory tracts which is effective in ameliorating various symptoms relating to upper respiratory tracts is provided.An agent for protecting upper respiratory tracts and a food or drink composition for protecting upper respiratory tracts containing lactoferrin, lactoperoxidase, glucose oxidase, glucose source, and a pH adjusting component as active ingredients is provided.The agent for protecting an upper respiratory tract according to the present invention and the food or drink composition for protecting an upper respiratory tract can ameliorate various symptoms relating to upper respiratory tracts.
