Department of Kinesiology, The Pennsylvania State University, University Park, State College, PA 16802, USA.
Sports Science Insights, LLC, Crystal Lake, McHenry County, IL 60014, USA.
Nutrients. 2020 May 21;12(5):1502. doi: 10.3390/nu12051502.
Milk permeate is an electrolyte-rich, protein- and fat-free liquid with a similar carbohydrate and mineral content to that of milk. Its hydration efficacy has not been examined. The beverage hydration index (BHI) has been used to compare various beverages to water in terms of post-ingestion fluid balance and retention. Our purpose was to compare the BHI (and related physiological responses) of a novel milk permeate solution (MPS) to that of water and a traditional carbohydrate-electrolyte solution (CES). Over three visits, 12 young subjects consumed 1 L of water, CES, or MPS. Urine samples were collected immediately post-ingestion and at 60, 120, 180, and 240 min. BHI was calculated by dividing cumulative urine output after water consumption by cumulative urine output for each test beverage at each time point. The BHI for MPS was significantly higher at all time points compared to water (all < 0.001) and CES (all ≤ 0.01) but did not differ between CES and water at any time point. Drinking 1 L of MPS resulted in decreased cumulative urine output across the subsequent 4 h compared to water and CES, suggesting that a beverage containing milk permeate is superior to water and a traditional CES at sustaining positive fluid balance post-ingestion.
奶渗透物是一种富含电解质、无蛋白质和脂肪的液体，其碳水化合物和矿物质含量与牛奶相似。它的补水效果尚未得到检验。饮料水合指数（BHI）已被用于比较各种饮料与水在摄入后液体平衡和保留方面的差异。我们的目的是比较新型奶渗透物溶液（MPS）与水和传统碳水化合物-电解质溶液（CES）的 BHI（和相关生理反应）。在三次访问中，12 名年轻受试者每人饮用 1 升水、CES 或 MPS。摄入后立即收集尿液样本，并在 60、120、180 和 240 分钟时收集。BHI 通过将水消耗后累积的尿量除以每个测试饮料在每个时间点的累积尿量来计算。与水（均<0.001）和 CES（均≤0.01）相比，MPS 的 BHI 在所有时间点均显著升高，但在任何时间点均与 CES 无差异。与水和 CES 相比，饮用 1 升 MPS 会导致随后 4 小时内累积尿量减少，这表明含有奶渗透物的饮料在摄入后维持正液体平衡方面优于水和传统 CES。
