Have a "true" snack.
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What many people consider a "snack"—an energy bar, part of a bag of chips, or side order at a fast-food restaurant—can actually have 400 or more calories, making it more like a meal. A true snack, says Melanie Douglass, a registered dietitian and personal trainer based in Salt Lake City, is about 150 to 200 calories. Here are several of her healthful snack suggestions that fit the bill.