The obesity-research community is becoming increasingly aware that the artificial
sweeteners used in diet soda—aspartame and sucralose, for instance—lead to hard-to-control
food urges later in the day. One Purdue study discovered that rats took in more
calories if they'd been fed artificial sweeteners prior to mealtime, and a University
of Texas study found that people who consume just three diet sodas per week were
more than 40 percent more likely to be obese. Try weaning yourself off by switching
to carbonated water and flavoring with lemon, cucumber, and fresh herbs.