September 07, 2001

Just one heavenly chocolate truffle wont wreck your diet, right? Wrong. A joint study from the University of Miami and the University of Florida found that a single bite of a sweet can trigger a desire for more sweet or fattening foods—like ice cream, pizza, potato chips, and doughnuts.

"A small indulgence may prime a pleasure trigger and lead to more indulgence," the authors conclude. Your best bet: Instead of indulging on a whim, make an advance plan and stick to it. Tell yourself, "I'll let myself have only one sweet a day—tonight itll be a scoop of low-fat ice cream after dinner."