As for topic of this invention, concentration of the protein and calcium etc is higher than the former milk, nutrition value is high, there are times when the concentrated milk which possesses per opening which is done at all is offered. With this invention, decreasing viscosity the concentrated milk whose fat-free milk solids amount concentration is high deoxidation by treating before the sterilization treatment, it is possible to offer the concentrated milk which possesses per desirable opening.本発明の課題は、タンパク質やカルシウム等の濃度が従来の牛乳よりも高く、栄養価が高いながらも、サッパリとした口当たりを有する濃縮乳を提供することにある。本発明では、無脂乳固形分濃度の高い濃縮乳を殺菌処理の前に脱酸素処理することにより、粘度を低下させて、好ましい口当たりを有する濃縮乳を提供することができる。
