Journal of the American College of Nutrition
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Randomized Controlled Trial Clinical Trial
The effect of caffeinated, non-caffeinated, caloric and non-caloric beverages on hydration.
To examine the effect of various combinations of beverages on hydration status in healthy free-living adult males. ⋯ This preliminary study found no significant differences in the effect of various combinations of beverages on hydration status of healthy adult males. Advising people to disregard caffeinated beverages as part of the daily fluid intake is not substantiated by the results of this study. The across-treatment weight loss observed, when combined with data on fluid-disease relationships, suggests that optimal fluid intake may be higher than common recommendations. Further research is needed to confirm these results and to explore optimal fluid intake for healthy individuals.