Clinical and experimental studies demonstrate that the specific nutritional and electrolyte composition of a beverage directly influences fluid retention, urine output, and overall hydration status.
The claim states that beverage composition determines whether it promotes hydration or diuresis. Multiple retrieved papers investigate how varying components such as sodium, carbohydrates, proteins, and electrolytes modify the beverage hydration index and fluid retention relative to plain water. These studies consistently show that differences in composition dictate hydration efficacy, directly supporting the claim. No papers refute this relationship.