Athletes are particularly vulnerable, Gadde said, given the excess sweating that accompanies vigorous activity. "(And) people who are trying to lose weight often switch from sugary beverages to diet beverages, which can also increase risk for lowering of potassium levels when consumed in large quantities due to cumulative increase in daily caffeine consumption," he said.
Moderation, he concluded, "is the key to consumption of sodas and other caffeinated beverages."
That point was seconded by Lona Sandon, a registered dietitian and an assistant professor of clinical nutrition at the University of Texas Southwestern at Dallas.
"Common sense and critical thinking should tell us that relying solely on soda for fluid intake is not healthy," Sandon said. "Heavy reliance on any one single food or beverage is not recommended."
For more about healthy hydration, visit the U.S. Centers for Disease Control and Prevention.
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