A method for producing a nutritional composition according to the present invention is a method for producing a nutritional composition containing a protein and a mineral group comprising at least two minerals, and comprises adding (a) a powder or an aqueous solution of at least one mineral that can be converted into the form of a bivalent ion when prepared into an aqueous solution or (b) a mineral powder mixture comprising at least one mineral that can be converted into the form of a bivalent ion when prepared into an aqueous solution and at least one another mineral that is included in the mineral group to an aqueous protein-rich solution containing a whey protein in such an amount that the mass of a protein derived from the whey protein becomes 2 to 12 g/100 ml and agitating the resultant mixture. In the method, when there is any remaining mineral spices among the mineral group, a powder of the remaining mineral spices is also added to the above-mentioned aqueous protein-rich solution simultaneously or sequentially and then agitating the resultant mixture. 本発明による栄養組成物の製造方法は、タンパク質と、２種以上のミネラルを含むミネラル群とを含んでなる栄養組成物の製造方法であって、 ホエイタンパク質由来のタンパク質量が２～１２ｇ／１００ｍｌとなる量でホエイタンパク質を含むタンパク質濃厚水溶液に、 ａ）水溶液中で２価イオンとなるいずれか一種のミネラルの粉体もしくは水溶液、又は ｂ）水溶液中で２価イオンとなるいずれか一種のミネラルと、ミネラル群に含まれる他の１種以上のミネラルとからなるミネラル粉体混合物を投入して混合し、 ミネラル群に残りの種のミネラルが存在する場合には、得られたタンパク質濃厚水溶液にさらに残りの種のミネラルの粉体を同時または逐次投入して混合することを含む。
