Frozen or Canned Fruit
Any food swimming in juice or "light syrup" isn't good for you. Furthermore, most canned fruit is peeled, meaning you're being robbed of a valuable source of fiber. Frozen fruit is a little trickier. Freezing preserves the fruit itself, but some manufacturers add sugar during the freezing process to preserve color and taste. Solution: Read that ingredients list! You want it to say fruit, water—and that's it.

Whole-grain wheat is better for you than refined wheat. By keeping the bran and germ, you maintain the naturally occurring nutrients and fiber. But, for some reason, manufacturers constantly come up with new ways to lead you back to the refined stuff. One of their latest tricks is to refer to refined flour as "wheat flour" because, obviously, it's made of wheat. But just because it's wheat-based doesn't mean it's not refined. The distracted shopper can mistake this label for "whole wheat flour" and throw it in his cart. Another loaf of cruddy, refined, fiberless bread has a new home.