Don’t let extra hours lounging in bed stand between you and a flatter belly. While getting enough sleep can help boost your metabolic rate, sleeping in may undo any benefit you’d enjoy from catching a few extra winks. One study reveals that late sleepers who snoozed past 10:45 in the morning ate nearly 250 more calories over the course of the day, despite eating half as many fruits and vegetables as their early bird counterparts. Even worse, they chowed down on more salty, sugary, and trans fat-laden fast food than those who woke up earlier. If you happen to head out of the house early, you’re in for an additional metabolic boost; researchers at Northwestern University have found that people exposed to just a short period of early morning sunlight had lower BMIs than their late-waking counterparts.
Tight deadlines, bills, your kids—whatever your source of stress, having too much of it may make it harder for you to drop unwanted pounds, especially from your middle. And it's not just because you tend to reach for high-fat, high-calorie fare when you're stressed, though that's part of it. It's also due to the stress hormone cortisol, which may increase the amount of fat your body clings to and enlarge your fat cells. Higher levels of cortisol have been linked to more visceral fat.
A close contender for top place as one of the best fat-busting foods is asparagus, according to White. “Asparagus is a natural diuretic, and is also loaded with vitamins. Per one cup cooked it’s only 25 calories, but thanks to the fiber it will fill you up. You can grill it or steam it (steaming will probably be the cleanest way to prepare it), you can boil it or even microwave it. I’ve even seen people eat it raw. You can throw olive oil on it and saute it. There are a lot of different options here. You just want to stay away from the butter,” says White. Due to the diuretic properties of asparagus, you may see more immediate reductions in stomach bloating, reducing your pounch’s appearance while you work over time to really tighten it up.
You know you're supposed to eat more protein to lose weight, but you might not know exactly why. Well, it actually has to do with how your body handles insulin. "Your body starts to produce more insulin as you age, since your muscle and fat cells aren't responding to it properly," explains Louis Aronne, M.D., director of the obesity clinic at Cornell University.
Sleep takes all that hard work you’re doing in the kitchen and the gym, and fast tracks those results. A good night’s sleep helps your body recover from activity and also regulates hormones responsible for hunger cues. “Sleep is essential [for fat loss and overall health]. It’s recommended that adults get 7-8 hours per night. There are a lot of studies on [sleep and fat loss], showing that good sleep can help us eat better and help us to lose weight,” says White. The two specific hormones sleep has an influence over are leptin and ghrelin. Leptin works to keep your energy steady and appetite low. Alternatively, ghrelin increases feelings of hunger. When you fail to get adequate sleep, ghrelin is increased and leptin is decreased, which messes with your hunger signals and can cause you to eat more. By getting your 7-8 hours a night you’ll avoid any wacky cravings and emotional eating, which will make your fat-loss goals that much easier to achieve.
Nuts have a very high satiety power—meaning they make you feel fuller after eating than many other foods. And even though they’re high in calories, those calories appear to be processed differently in the body. University of Michigan researchers found that men who added 500 calories’ worth of peanuts a day to their diet gained no excess weight at all.
Canned tuna could be your solution to a flatter belly — and it'll only cost you around 80 cents a pop. "Canned tuna — as well as other fish — is an excellent source of omega-3 fatty acids," Taub-Dix days. "Besides promoting heart health, omega-3s help you ditch pounds by keeping you feeling satisfied while repairing and replenishing muscles." Win-win, much? Instead of making tuna salad with fatty mayo, try Greek yogurt instead. The mix makes the perfect filling for a healthy lettuce wrap or stuffed into an avocado half.
Visceral fat—a type of fat that lies deep inside your abdomen and surrounds your internal organs—is linked to a whole slew of terrifying health problems like heart disease and type 2 diabetes, according to the Mayo Clinic. Even scarier: According to the National Heart, Lung, and Blood Institute (NHLBI), your risk of those health issues increases even more if your waist size is greater than 35 inches for women and 40 inches for men.