Abstract: 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.

Abstract: Disclosed are: a method for utilizing a kombu (kelp) extract as an antibacterial auxiliary agent; and a method for utilizing a combination of the antibacterial auxiliary agent, lactoperoxidase, glucose oxidase and glucose as an antibacterial composition having a potent antibacterial activity. Specifically disclosed are: an antibacterial auxiliary agent comprising a fraction having a molecular weight of 5000 or less and produced from a kombu extract as an active ingredient; an antibacterial composition comprising the antibacterial auxiliary agent, lactoperoxidase, glucose oxidase and glucose; an antibacterial composition as mentioned above, which additionally comprises xanthane gum; and a food or beverage containing the antibacterial composition.

Abstract: Disclosed is a disinfectant which is safe, has few adverse side-effects, can be ingested together with a food or beverage by adding the disinfectant to the food or beverage, shows a bactericidal effect in the oral cavity, and has no problem even when ingested on a daily basis over a long period. Also disclosed is a food additive comprising the disinfectant. Specifically, disclosed is an oral disinfectant for the disinfection of an oral bacterium, which comprises lactoperoxidase, glucose oxidase, glucose and a pH-adjusting component.

Abstract: It is intended to provide a pharmaceutical composition, a food or drink, or a feed which has an effect on the prevention and/or treatment of an intestinal disease such as ulcerative colitis, Crohn's disease or irritable bowel syndrome. A preferred embodiment is the pharmaceutical composition, food or drink, or feed which contains lactoperoxidase as an active ingredient and has an effect on the prevention and/or treatment of an intestinal disease, wherein the intestinal disease is at least one disease selected from ulcerative colitis, Crohn's disease and irritable bowel syndrome.

Abstract: A process for producing lactoperoxidase, including: a step (1) for bringing one or more milk materials into contact with a cation exchanger having weakly acidic groups as ion exchange groups to thereby effect adsorption treatment; a step (2) for washing the cation exchanger after the adsorption treatment; a step (3) for bringing the cation exchanger after the washing into contact with a leaching solvent to thereby obtain a leaching solution having lactoperoxidase eluted into the leaching solvent; a step (4) for concentrating the leaching solution through an ultrafiltration membrane to thereby effect precipitation in the concentrated leaching solution; and a step (5) for obtaining a lactoperoxidase solution by removing the precipitation from the concentrated leaching solution.

Abstract: An interleukin-6 suppressive agent comprising lactoperoxidase as an active ingredient is used as a pharmaceutical preparation or the like for prevention and/or therapy of a disease caused by production of interleukin-6, such as thrombocytosis, myeloma, Castleman syndrome, rheumatoid arthritis, or influenza-virus infectious disease.

Abstract: Disclosed is a disinfectant which is safe, has few adverse side-effects, can be ingested together with a food or beverage by adding the disinfectant to the food or beverage, shows a bactericidal effect in the oral cavity, and has no problem even when ingested on a daily basis over a long period. Also disclosed is a food additive comprising the disinfectant. Specifically, disclosed is an oral disinfectant for the disinfection of an oral bacterium, which comprises lactoperoxidase, glucose oxidase, glucose and a pH-adjusting component.

Abstract: It is intended to provide a pharmaceutical composition, a food or drink, or a feed which has an effect on the prevention and/or treatment of an intestinal disease such as ulcerative colitis, Crohn's disease or irritable bowel syndrome. A preferred embodiment is the pharmaceutical composition, food or drink, or feed which contains lactoperoxidase as an active ingredient and has an effect on the prevention and/or treatment of an intestinal disease, wherein the intestinal disease is at least one disease selected from ulcerative colitis, Crohn's disease and irritable bowel syndrome.

Abstract: A process for producing lactoperoxidase, including: a step (1) for bringing one or more milk materials into contact with a cation exchanger having weakly acidic groups as ion exchange groups to thereby effect adsorption treatment; a step (2) for washing the cation exchanger after the adsorption treatment; a step (3) for bringing the cation exchanger after the washing into contact with a leaching solvent to thereby obtain a leaching solution having lactoperoxidase eluted into the leaching solvent; a step (4) for concentrating the leaching solution through an ultrafiltration membrane to thereby effect precipitation in the concentrated leaching solution; and a step (5) for obtaining a lactoperoxidase solution by removing the precipitation from the concentrated leaching solution.

Abstract: An interleukin-6 suppressive agent comprising lactoperoxidase as an active ingredient is used as a pharmaceutical preparation or the like for prevention and/or therapy of a disease caused by production of interleukin-6, such as thrombocytosis, myeloma, Castleman syndrome, rheumatoid arthritis, or influenza-virus infectious disease.

Abstract: An interleukin-6 suppressive agent comprising lactoperoxidase as an active ingredient is used as a pharmaceutical preparation or the like for prevention and/or therapy of a disease caused by production of interleukin-6, such as thrombocytosis, myeloma, Castleman syndrome, rheumatoid arthritis, or influenza-virus infectious disease.

Abstract: An interleukin-6 suppressive agent comprising lactoperoxidase as an active ingredient is used as a pharmaceutical preparation or the like for prevention and/or therapy of a disease caused by production of interleukin-6, such as thrombocytosis, myeloma, Castleman syndrome, rheumatoid arthritis, or influenza-virus infectious disease.