Method for producing a formulated milk for infants analogous to human milk

In a method for producing a formulated milk composition for infants which is analogous to human milk, which formulated milk is prepared by mixing together whey protein concentrate, casein, lactose, soluble polysaccharide, fat, ash and vitamins, the improvement comprising using, as a material to increase the concentration of non-protein nitrogen in said formulated milk to 60% or more of non-protein nitrogen in human milk, a substance containing non-protein nitrogen components which are prepared by:

• subjecting whey from which casein and fat have been removed to ultrafiltration to obtain a permeate;
• concentrating said permeate;
• removing lactose and desalting said concentrated permeate;
• and
• drying said permeate;
• wherein the ratio of the amount of .beta.-lactoglobulin to the amount of .alpha.-lactalbumin is from 1:1 to 1:5.