Chia Seeds
Packed with omega-3 fats, fiber, and protein, these tiny seeds help suppress the appetite, fire up the metabolism, and turn on glucagon, one of the body's fat-burning hormones. The trick is to soak them for 15 minutes so they swell up to 10 times their size. Just as with oatmeal, the larger the seeds are, the quicker your stomach will release those hormones that let you know you're full—and hopefully satisfied