Studies of milk components to develop a novel rehydration fluid for aged people with body water loss.

为了快速有效地补充水分，摄入的液体应在饮用后在血浆中停留很长时间。我们研制了一种新型的精确代谢笼，用于大鼠饮水后的尿量分析。喝牛奶4小时后，尿量比喝水上运动饮料少50%左右。不同饮料之间尿量的差异可以用两个等效分数来解释，即高分子分数和低分子分数。饮用牛奶后血浆容量维持在较高水平，这可以通过血浆钠水平来解释。

For a rapid and efficient rehydration, ingested fluid should stay in plasma for a long time after drinking. We developed a novel and precise metabolic cage for rats to analyze urine volume after drinking. Urine volume was about 50% lower after drinking milk compared to water sports drink for 4 hr. The difference of urine volume among drinks was explained by two equivalent fractions, such as high molecular and low molecular fraction. Plasma volume was sustained on higher level after drinking milk and which can be elucidated by plasma sodium level.