Whether it’s turning off fat genes, helping to build muscle that robs energy from adipose cells, revving your metabolism and ability to burn fat, or helping you feel fuller longer so you consume fewer calories, these foods have been proven to show an increased rate of fat loss. So stop these bad habits that give you belly fat, and instead, incorporate these healthy fat burning foods into your diet to whittle your waist and bring your midriff back in line.
Citrus fruits contain the fat-burning nutrients fiber and vitamin C. Vitamin C stimulates your body's fat-burning capability found in the carnitine amino acid, according to Fat Free Kitchen. Vitamin C plays a role in your body's fat processing capability. This nutrient speeds the process up by diluting the fat and then eliminating it from your body. Eat a variety of fiber and vitamin C-rich citrus fruits to increase your metabolism and burn fat. Citrus fruits include grapefruit, guava, lemons, limes, oranges, tangerines, papaya and tomatoes. Drinking juices made from these fruits can also help burn fat.
For example, you might not realize just how much you eat when you go out to happy hour with friends. But if you take the split second to take a step back and make yourself aware of that fact, you’re more able to make a healthy decision. “The awareness and then planning and coming up with strategies for what else I can be doing—that might give me the same benefit of eating those comfort foods that make me feel better,” says Gagliardi.

Don’t buy your tickets to Bonnaroo just yet; the kind of acid that will help you slim down is the stuff right inside your cabinet. A 12-week study published in Bioscience, Biotechnology, and Biochemistry reveals that obese study subjects who made vinegar part of their diet dropped more belly fat than a control group, and other research suggests that acidic foods, like vinegar, can increase the human carbohydrate metabolism by as much as 40 percent.
Don’t let extra hours lounging in bed stand between you and a flatter stomach. 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 Obesity 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. 
×