If you were to describe The Perfect Food, it might go something like this: healthful, delicious, bigger than a morsel and filling enough to fight hunger for hours. "Foods that promote satiety" -- a feeling of lasting fullness -- "do exist," insists Dr. David Katz, founder of the Yale University Prevention Research Center.
What makes some grub extra satisfying? "Fiber and protein can help," says Barbara Rolls, author of "The Ultimate Volumetrics Diet." Getting more bang for your bite matters, too: Low-energy-density foods, which yield big portions for few calories, "allow you to eat more without gaining weight," Rolls says. Want some of that? Make room for these secret-weapon picks.Health.com: The 25 best diet tricks of all time