The present invention relates to the improvement of the method of producing nutritional products (eg infant formulas) comprising milk proteins and lactose. The present invention is particularly useful for the production of demineralized nutritional products, and provides both final nutritional products and lactose-containing milk protein serum components useful for the production of such nutritional products. [Selected figure] Figure 1本発明は、乳タンパク質および乳糖を含む栄養製品（例えば乳児用調合乳）の製造方法の改善に関する。本発明は、脱ミネラル化栄養製品の製造に特に有用であり、最終栄養製品およびそのような栄養製品の製造に有用な乳糖含有乳タンパク質血清成分の両方を提供する。【選択図】図１
