"America has been trying to follow a low-calorie, low-fat diet for 40 years, and where has that gotten us? To being one of the heaviest countries in the world," says David Ludwig, M.D., Ph.D., obesity expert and author of Always Hungry. Think about it: "The problem is when you cut back on calories like that, your body tries to fight back with increased hunger and a slower metabolism because it thinks it's going into starvation mode," he says. Meanwhile, you eventually eat again to satiate the hunger pangs, and likely eat more because, well, you're insanely hungry. But your metabolism is still operating on that low level, so calories don't get burned fast enough and they get stored as fat. Ludwig says this cycle continues until you feed your body regularly (he suggests at least three meals and two snacks in between) with real food made from real ingredients. That matters more than the calories it's made up of, so repeat after us: I will always choose an all-natural version of something over food that's labeled low-calorie or fat-free.
Belly fat also responds to a lower-calorie diet that's full of healthy, unprocessed foods. Go for lean protein, fresh produce and whole grains at meals. When you have just a week to lose as much as possible, ban all sweetened drinks -- including soda and juice -- bakery treats and ice cream. Also avoid refined grains, such as pizza and white bread, as well as alcohol. Keep your portion sizes to just 2 to 4 ounces for meats and other proteins and about 1/2 cup for grains. Over the long term, these dietary revisions help you drop belly fat.
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.
Here's something else most people probably don't know: Fidgeting is good for you. It's considered a nonexercise physical activity, and it's an important way to burn energy. You get more health benefits if, in addition to exercising, you are a more fidgety, more active person the rest of the day. This means gesturing while you're talking, tapping your foot, just moving around.
Try this interval-training trick on the elliptical trainer: Ride for 30 seconds as fast as you can, then immediately reverse your direction and ride for 30 additional seconds just as fast in the opposite direction. Rest 60 seconds, and repeat. The force of stopping your momentum, as well as going from a dead stop to full speed twice in the same interval, will give your fat-burning efforts a massive boost, says Alwyn Cosgrove, C.S.C.S.
"A study published in study published in Nutrition Journal linked calcium and vitamin D supplementation over 12 weeks with belly fat reduction in obese and overweight college students," says Amidor. "These participants also lowered their calories during this time frame. Although the study was done with supplements, milk is brimming with both calcium and vitamin D, and can be part of a healthy weight loss plan."
Most of the bacteria that dwell in your gut are pretty useful. They produce hormones, regulate your immune system, digest food, extract nutrients, control your mood, manage your appetite, and much more besides. That obese people tend to have higher numbers of Firmicutes bacteria is no coincidence – according to research published in the online journal Nature, these bacteria increase the number of calories your body absorbs from food.
There's a reason poop is being talked about so much these days — when there's problems with it, it's an easy tip-off that something's not quite right with your insides. But most people don't realize that constipation leads to weight gain, so they never consider it to be the culprit behind those tighter-fitting jeans. "If you're constantly constipated, then it likely means you're on a poor diet that can also make you overweight, or you lack important nutrients that help keep things moving," explains Vincent Pedre, M.D., author of Happy Gut. Besides drinking plenty of water throughout the day (don't guzzle it down in one meal, as that can slow down digestion), Pedre says to eat plenty of fiber-rich legumes like yellow beans and lentils to keep your stool moving. And don't worry about bloat or gas — soaking beans overnight nixes that problem.
Some people can lose more than 2 pounds in a week with a dedicated fitness program and serious dietary restrictions.The time and effort required to lose weight that quickly is grueling and usually unsustainable, though. Even if you can lose a notable amount of weight in a week, a lot of it will be water weight -- not true belly fat. Weight you lose quickly is likely to be regained quickly too.