SPINACH
“Kale and spinach are what I like to call ‘good bang-for-your-buck’ foods,” says Shalek. “What I mean by that is you can fill up on them without taking in an abundance of calories, and they keep you full between meals.” Added perk: They also contain important vitamins, such as vitamins C, A, and K and are high in iron.
Fiber per serving: 4 grams per cup