Abstract: A method for producing a sugar-containing liquid, including mixing a raw material liquid and a hop extract water; a sugar-containing liquid produced by the method; and a beer-taste beverage wherein a sugar-containing liquid obtained by the method is used. The method of the present invention can prepare a sugar-containing liquid having a high polyphenol concentration with an excellent productivity, so that a beer-taste beverage given with body can be provided. In addition, since the method of the present invention controls the amount of production of hop draff, some excellent effects are exhibited that the loss in stock of the sugar-containing liquid obtained is controlled, which contributes to excellent productivity.

Abstract: A method for producing a hop extract including filtering a hop-containing water at a temperature of 50° C. or higher, to give a hop extract. According to the method of the present invention, a hop extract having a high polyphenol concentration can be conveniently prepared, and is suitably used as raw materials for compositions for treating and/or ameliorating proteotoxin neutralization, inhibition of enamel decalcification, body fat modulation, protection of periodontal membranes, virus inactivation, inhibition of overexpression of thymic stromal lymphopoietin, symbiotic regeneration, obesity, anti-inflammation, inflammatory bowel disease, coronary artery disease, hyperuricemia, allergic diseases, digestive diseases, and the like.

Abstract: A method for preserving a liquid that contains a flavor component derived from a food material, comprising adding a pH-adjuster to the liquid.