But you’ll likely experience some benefit before then. Fiber helps slow down your digestion and requires more chewing, which helps signal to your body that it’s full, keeping your hunger in check throughout the day. One small study published in Food & Nutrition Research actually found that men who ate meals rich in high-fiber foods, like beans and peas, felt more satisfied than those who focused only on protein-rich foods, like pork and veal. Adult women should aim to eat 25 to 28 grams of fiber per day.
Intermittent fasting has blown up in the past year, but scientists are just starting to figure out how it can help you lose weight. In one study from the University of Illinois at Chicago, researchers compared obese people in a traditional weight loss group and fasting group. For the experiment, the calorie-restricted group simply reduced the amount of calories they ate by 25 percent each day. The fasting group, however, alternated days: they ate 25 percent of the calories they needed one day between 12 and 2 p.m., and then had feast days the next, where they ate 125 percent of their required calories.
The study authors believe that sleep deprivation can cause your body to produce extra hunger hormones (like ghrelin) and fewer satiety hormones (like leptin). This means you’ll feel hungrier and have a harder time controlling your cravings once they hit. Most adults should aim for at least 7 to 9 hours of shuteye per night, per the National Sleep Foundation’s recommendations.
While the Duke study found no added benefit to resistance training (aka weight or strength training) when it comes to belly fat, a 2014 study from a Harvard University team found otherwise. Twenty minutes of weights a day was linked to less of an increase in belly fat (particularly for older men). “Engaging in resistance training or, ideally, combining it with aerobic exercise could help older adults lessen abdominal fat while increasing or preserving muscle mass," said the paper’s lead author Rania Mekary.
Hate having to pass on the potatoes for the sake of your pants size? Well, you may not have to. Just eat them cold—as in vinegar potato salad. If you chill potatoes overnight, they form something called resistant starch crystals—a constituent of fiber that triggers the production of two hunger-halting hormones, according to research. And resistant starch helps the body incinerate more fat for fuel while making less fat available to stash away in fat cells. (Related: Find out how vinegar potato salads help your blood sugar, too.)
A daily run or Spin class is great for your heart, but cardio workouts alone won't do much for your waist. "You need to do a combination of weights and cardiovascular training," says Sangeeta Kashyap, MD, an endocrinologist at Cleveland Clinic. Strength training increases muscle mass, which sets your body up to burn more fat. "Muscle burns more calories than fat, and therefore you naturally burn more calories throughout the day by having more muscle," says Kate Patton, a registered dietitian at Cleveland Clinic. Patton recommends 250 minutes of moderate-intensity exercise or 125 minutes of high-intensity exercise a week.
Seems the white version of this brew may be a veritable fat blaster. When human fat cells were treated with white tea extract in a lab study, the cells absorbed about 70% less fat than the untreated cells did. And those same tea compounds also triggered the breakdown of fat in existing cells. (Related: Here's another kind of tea that can help whittle your waist.)
Noam Tamir, C.S.C.S, founder of TS Fitness, also says that metabolic resistance training and high-intensity interval training is a solid way to reduce fat all over, including belly fat. “These [types of exercise] help to burn calories during the workout, and they also give you that after-burn effect,” he says. “Plus, they help to change your body composition by increasing your muscle mass.”