A 2012 study in the Journal of Functional Foods found that people who drank one and a half cups of green tea enriched with a total of 609 milligrams of catechins (a group of antioxidants that have been shown to help burn fat cells) every day for 12 weeks lost almost 16 times as much visceral fat as those who consumed green tea without the added antioxidants. To achieve similar results with store-bought green tea, you’ll need to brew two to four cups daily (many varieties can contain 160 to 470 milligrams of catechins per cup).
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.
"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."
Forget apples (okay, not really) — avocados reign supreme when it comes to weight loss. They're rich in monounsaturated heart-healthy fat, and studies show eating just half of one with lunch can curb your appetite. "Slice one in half, sprinkle a little sea salt, and eat the inside with a spoon," says Alexandra Samit, a Be Well Health Coach at Dr. Frank Lipman's Eleven Eleven Wellness Center in NYC. Or top off your salad with a few pieces, as research found that doing so allows you to absorb three to five times more carotenoids, a disease-fighting compound associated with improved weight and fat loss.
We now know that this type of fat, called visceral fat, is metabolically active and churns out stress hormones like cortisol and inflammatory substances called cytokines that affect you body’s production of insulin. The result is worse than just being generally overweight; you’re looking at increased risks of type 2 diabetes, high blood pressure, high cholesterol, heart disease, stroke, some cancers, and even dementia.
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.