National Centre for Sport and Exercise Medicine, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.
NIHR Applied Research Collaboration East Midlands, Diabetes Research Centre, University of Leicester, Leicester, UK.
Eur J Appl Physiol. 2024 Oct;124(10):3085-3093. doi: 10.1007/s00421-024-05516-0. Epub 2024 May 29.
Cow's milk is one of the most hydrating beverages, but many individuals choose not to consume dairy in their diet due to intolerance, allergy, or dietary preference. Milk is commonly replaced with plant-based beverages, including soya which has the most comparable protein content, but little is known about their hydration potential. This study compared fluid and electrolyte balance responses between a soya beverage and skimmed cow's milk.
Ten healthy males [age 27 (6) y; body mass index 24.6 (2.3) kg/m] completed two randomised counterbalanced trials, involving consuming 1000 mL water from approximately isocaloric amounts of skimmed cow's milk (MILK) or a sweetened soya beverage (SOYA), in four aliquots over 30 min in a euhydrated fasted state. Volume, specific gravity, and electrolyte (sodium, potassium, chloride) concentrations were determined in total-void urine samples collected pre-/post-beverage ingestion, and hourly for 180 min thereafter. Hunger, thirst, nausea and stomach fullness were rated proximal to urine samples.
Total urine mass (MILK, 986 ± 254 g; SOYA, 950 ± 248 g; P = 0.435) and urine specific gravity (P = 0.156) did not differ between trials. Potassium balance was greater in SOYA 0-180 min post-beverage (P ≤ 0.013), whilst chloride balance was greater in MILK 0-120 min post-beverage (P ≤ 0.036). Sodium balance (P = 0.258), total electrolyte balance (P = 0.258), and subjective measures (P ≥ 0.139) were not different between trials.
Replacing cow's milk with a soya beverage did not negatively impact fluid balance in healthy young males, making it a viable option for those who choose not to consume dairy in their diet.
牛奶是最能补水的饮料之一，但由于不耐受、过敏或饮食偏好，许多人选择不将其纳入饮食。牛奶通常被植物性饮料替代，包括蛋白质含量最接近牛奶的大豆，但人们对这些饮料的补水潜力知之甚少。本研究比较了大豆饮料和脱脂牛奶对水合作用和电解质平衡的影响。
10 名健康男性[年龄 27（6）岁；体重指数 24.6（2.3）kg/m]完成了两项随机、对照平衡试验，在空腹状态下，以等热量的方式分别饮用 1000 毫升水（来自脱脂牛奶 MILK）或加糖大豆饮料 SOYA），4 次 30 分钟，在总尿液样本中测定体积、比重和电解质（钠、钾、氯）浓度收集在饮用前/后和之后 180 分钟的每个小时。在收集尿液样本时，对饥饿、口渴、恶心和饱腹感进行近端评估。
MILK 和 SOYA 试验的总尿量（MILK，986±254g；SOYA，950±248g；P=0.435）和尿比重（P=0.156）无差异。SOYA 0-180 分钟后钾平衡更高（P≤0.013），而 MILK 0-120 分钟后氯平衡更高（P≤0.036）。钠平衡（P=0.258）、总电解质平衡（P=0.258）和主观指标（P≥0.139）在两个试验中无差异。
用大豆饮料替代牛奶不会对健康年轻男性的液体平衡产生负面影响，因此对于那些选择不将牛奶纳入饮食的人来说，这是一个可行的选择。
