Problem to be solved. To improve the heat resistance in a beverage containing a protein and fruit juice, etc. Solution. Provided is a method for producing a beverage, in which a composition (A) which is at least one of a milk ultrafiltration membrane permeate or a preparation in which lactose in the ultrafiltration membrane permeate is reduced, and a fruit juice (B) which is one or more selected from the group consisting of fruit juice and vegetable juice are mixed to prepare a raw material composition, and the raw material composition is heat-sterilized.

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