Abstract: The invention is to provide a process for producing a liquid food, characterized by subjecting at least one of coffee, a milk composition, a food material (liquid) containing a component(s) having an antioxidation ability (radical-scavenging activity) and mixed liquids containing one(s) of them to an electrolysis treatment and/or a current passage treatment. Since the invention can prevent quality deterioration of coffee or milk composition over a long period of time without using additives and also improve safety, it is appropriate for producing canned coffee, milk-containing coffee or milk-containing tea drink to be sold in vending machines or can warmers. Further, since the invention can improve the antioxidation ability of foods, the resulting foods can suppress the in-vivo increase of active oxygen and free radicals, it greatly contributes to health.

Abstract: The present invention provides a process for producing a powdered drink characterized by subjecting a liquid food to electrolysis treatment and/or current passage treatment, and drying and powdering, further allowed by granulating, if necessary. As the liquid food, coffee extract, coffee essence (concentrated coffee extract), milk, pretreated milk and etc. may be used. The instant coffee obtained in the invention can be preserved for a long period of time without deterioration of flavor or quality, without using a food additive.

Abstract: The invention is to provide a process for producing a liquid food, characterized by subjecting at least one of coffee, a milk composition, a food material (liquid) containing a component(s) having an antioxidation ability (radical-scavenging activity) and mixed liquids containing one(s) of them to an electrolysis treatment and/or a current passage treatment. Since the invention can prevent quality deterioration of coffee or milk composition over a long period of time without using additives and also improve safety, it is appropriate for producing canned coffee, milk-containing coffee or milk-containing tea drink to be sold in vending machines or can warmers. Further, since the invention can improve the antioxidation ability of foods, the resulting foods can suppress the in-vivo increase of active oxygen and free radicals, it greatly contributes to health.