这项研究的作者、圣安德鲁斯大学医学院教授罗纳尔德·莫恩说,原因和我们的身体对饮料的反应机制有关。一个因素是饮料的摄入量:你喝得越多,饮料从胃里排空并被血流吸收的速度越快,从而稀释体液,给你补水。
The other factor affecting how well a beverage hydrates relates to a drink's nutrient composition. For example, milk was found to be even more hydrating than plain water because it contains the sugar lactose, some protein and some fat, all of which help to slow the emptying of fluid from the stomach and keep hydration happening over a longer period of time.
另一个影响饮料补水功效的因素和饮料的营养成分有关。例如,研究人员发现,牛奶的补水功效甚至比白水更佳,因为牛奶含有乳糖、蛋白质和脂肪,这些成分都有助于减缓液体从胃里排空的速度,延长补水的功效。
Milk also has sodium, which acts like a sponge and holds onto water in the body and results in less urine produced.
牛奶还含有钠,钠可以像海绵一样在身体里留住水分,并导致产生的尿液减少。
The same can be said for oral rehydration solutions that are used to treat diarrhea. Those contain small amounts of sugar, as well as sodium and potassium, which can also help promote water retention in the body.
用来治疗腹泻的口服补水溶液也可以有同样的补水功效。那些含有少量糖、钠和钾的饮料也可以帮助人体留住水分。
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