From the YMCA:
While no food can specifically target one region of your body for fat burning, some foods can help support fat loss as part of a well-balanced diet, combined with routine physical activity. Incorporating such foods into your diet can help increase your metabolism and ward off fat as you strive to achieve the lean and sculpted body you desire.
Milk and Yogurt: Low-fat milk and plain low-fat yogurt are both excellent sources of calcium, which serves as a metabolic trigger. According to a study by the University of Tennessee, individuals who consumed between 1,200 and 1,300 mg of calcium each day lost about twice as much weight as individuals who did not consume as much calcium. Furthermore, an insufficient amount of calcium triggers the secretion of calcitriol, a hormone that causes you to store fat.
Lean Meats: Lean turkey, beef and chicken are all rich sources of protein, which helps you feel full faster, thus increasing the chance that you will eat less in a given meal. Turkey in particular has fewer calories per gram than any other source of animal protein. Turkey also contains the amino acid leucine, which helps preserve muscle mass as you lose weight. Including lean meats in your diet can help reveal lean and toned ab muscle definition when combined with an active lifestyle.
Fish: Several different types of fish contain elements that support fat burning. Salmon and tuna are rich sources of omega-3 fatty acids, which are responsible for lowering the levels of leptin in your body. Lower leptin levels are associated with a faster metabolism, thus helping you to burn fat and calories at a more rapid rate. Sardines and fish oil supplements also contain healthy fats that support efficient weight loss.
Whole Grain Cereal: Eating breakfast alone helps rev up your metabolism and keep your insulin level low. Whole grain cereal makes the perfect fat-burning breakfast, as it is rich in fiber and complex carbs. These components help boost your metabolism and help keep insulin levels low to reduce the rate at which you store fat.