Bob says that soda is one of the leading sources of empty calories in America. Instead, have plain or flavored water, herbal iced tea or skim milk. If you crave a sweet drink, limit yourself to one glass of fruit juice a day—better yet, cut it with seltzer water. If you feel diet sodas help you lose weight, drink them—but try to get down to one a day or you'll never lose your taste for super-sweet foods.

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