Nacho cheese tortilla chip, Doritos

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The Ultimate: 1-ounce snack bag of nacho-cheese tortilla chips (150 calories, 1.5g saturated fat)
These chips aren't just hard to resist—it's impossible to stop eating them until all that's left is the flavor dust on the bottom of a party bag.

The Alternate: Gensler suggests cheddar Goldfish (a .75-ounce 100-calorie pouch has 1g saturated fat). Surprised? These old-school Pepperidge Farm crackers are baked, not fried, which makes them less fattening than they taste.

Even Healthier: You can try to trick your craving by introducing it to a lean, low-cal doppelganger, Roberts says. Replicate the cheesy, spicy kick of the nacho-flavored tortilla chips by sprinkling 2 cups reduced-fat microwave popcorn with 2 tsp. Parmesan cheese and chili powder to taste (83 calories, 1g saturated fat). Scientists sang popcorn's praises at a recent conference, citing new research that shows the naturally high-fiber snack has impressive levels of polyphenols, a type of antioxidant that prevents damage to cells and may have disease-fighting properties.
As a reminder, always consult your doctor for medical advice and treatment before starting any program.