Bok choy, spinach, kale — healthy organisms in the gut, which needs trillions of good bacteria to function at its best, says Lipman. Look for ways to incorporate greens into every meal: Add sautéed kale to scrambled eggs, eat a spinach salad for lunch, and try a stir-fry with bok choy for dinner.
Craving something sweet? This fruit — along with colorful radishes, tomatoes, and carrots — contains arabinogalactans, a plant-based fiber and prebiotic that feeds the friendly bacteria that help your metabolism function optimally. The fiber also kills E. coli and klebsiella — two types of bad bacteria associated with carrying excess weight, Kellman says. Chop kiwi into grilled chicken salads or purée into smoothies for a colorful and sweet kick.
Having a hearty bowl of oatmeal for breakfast isn’t just delicious, it’s great for your waistline. “The whole grains not only absorb water to make you feel more full, but they’re also high in soluble fiber to keep you feeling satisfied for long periods of time,” says Bonnie Taub-Dix, R.D.N., creator of BetterThanDieting.com and author of Read It Before You Eat It. To really prevent any trips to the vending machine between meals, Taub-Dix recommends adding a spoonful of nut butter to your oats.