Milk is concentrated by filtering with an ultrafiltration (UF) membrane, after which casein is removed by acidification and the resulting liquid is concentrated and/or dried to produce a milk calcium composition having the following components' ratios (1) and (2): <DFG> <DF NUM="(1)"> -1.3 ≤ logä(% by weight calcium in composition)/(% by weight protein in composition)ü ≤ 0.26; </DF> <DF NUM="(2)"> 0.9 ≤ logä(% by weight calcium in composition)/(% by weight sodium in composition)ü </DF> </DFG>
