Older adults who drink diet soda may experience greater increases in their waist size over a decade than those who do not drink diet soda, according to a new study. Researchers found that the average increase in waist circumference among the people in the study who drank diet soda daily was more than triple that of the people who did not drink diet soda. Among the people who drank diet soda only occasionally, the increase was more than double that of those who did not drink diet soda. "The more people drank diet sodas, the more their waistlines expanded," said...