The present invention comprises a preparation step of preparing a raw material whey solution using a whey composition containing a whey protein, and a heating step of heat-treating the raw material whey solution, the preparation step comprising Including a treatment of adding an alkali to the whey composition, wherein the raw whey solution has a pH of 6.8 to 8.0, a protein concentration in the solution of 1.3% by mass or less, and the calcium of the raw whey solution to be heat-treated The present invention relates to a method for producing a modified whey composition and the like, wherein the content is 400 to 700 mg / 100 g solids and the heat treatment is performed at 80 to 150 ° C. for 30 minutes to 1 second.本発明は、ホエイタンパク質を含有するホエイ組成物を使用して原料ホエイ液を調製する調液工程と、前記原料ホエイ液を加熱処理する加熱工程と、を有し、前記調液工程が、前記ホエイ組成物にアルカリを添加する処理を含み、前記原料ホエイ液のｐＨが６．８～８．０、液中タンパク質濃度が１．３質量％以下であり、前記加熱処理する原料ホエイ液のカルシウム含量が４００～７００ｍｇ／１００ｇ固形分であり、前記加熱処理が、８０～１５０℃で３０分～１秒間の条件で行われる、改質ホエイ組成物の製造方法等に関する。
