Lean Proteins

"Depending on the type of food you eat, your body will burn a certain amount of calories just to digest that food. This is what's known as the thermic effect of food and is part of what makes our next food, lean proteins, so effective for belly fat loss. The importance of having enough protein when losing fat goes far beyond this," explains Ethier. "It's the most important food to help you maintain or even build more muscle as you lose fat. This will not only help you look better once you get lean enough to lose your belly fat, but it also seems to correlate well with preventing fat regain after your diet is over."

He recommends prioritizing lean proteins "that deliver significantly more protein for fewer calories," like egg whites, shrimp, protein powder, low-fat greek yogurt, extra lean ground beef, chicken breast, turkey, tofu, and white fish. "You can still have the fattier protein sources in moderation, but by eating mostly leaner proteins, you'll not only consume fewer calories, but you can also potentially swap those saved 'fat' calories for something else."

Collingwood agrees that protein has the highest TEF (thermic effect of food) "which is part of the reason protein keeps you full for longer and is excellent for weight maintenance and weight loss," she says. "Protein should be spread out throughout the day to optimize muscle most effectively."

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