4.
B Vitamins
What they are: These water-soluble vitamins play an important role in cell metabolism. These nutrients are actually made up of eight different vitamins.
The belly-flattening science: B vitamins help beat the bulge by converting protons, fats, and carbohydrates into energy—also increasing your metabolism. A study published in the International Journal of Sports Nutrition and Exercise Metabolism found that individuals with a lack of these vitamins performed worse during high-impact exercise than athletes with balanced levels of B-complex vitamins. Also, multiple studies show that those who lacked B vitamins experienced a decreased ability to repair and rebuild muscles.
Foods to choose: Salmon, eggs, poultry, oats, barley, avocado, nuts, and lentils.
5.
Calcium
What it is: Calcium is the most common mineral in the human body. About 99 percent of the calcium in the body is found in bones and teeth.
The belly-flattening science: A study published in Nutrition & Metabolism found that those who consumed 1,400 or 1,500 milligrams of calcium per day gained less body fat over a 4-year period. In another study at the University of Tennessee, scientists found that those who ate three daily servings of calcium lost 70 percent more weight and 64 percent more body fat.
Foods to choose: Hard cheese, low-fat milk, sardines, fortified orange juice, leafy greens and yogurt.
6.
Omega-3 Fatty Acids
What it is: Omega-3s are polyunsaturated fatty acids. They are considered essential fatty acids your body can’t make alone—you have to gain these through your diet.
The belly-flattening science: Several studies published in The American Journal of Nutrition and the International Journal of Obesity suggest that 1.5 to 2 grams daily of fish oil can produce weight loss of a couple of pounds over a month or so. A study from the University of Georgia found that fish oils prevent pre-fat cells from being converted into fat. Also, researchers from the University of Navarra in Spain and the University of Iceland found that Omega-3-rich foods keep people feeling full, longer.
Research also shows omega-3 fatty acids lower levels of stress hormones, such as cortisol, that can contribute to fat storage.
Foods to choose: Beyond taking a fish-oil supplement, you can get omega-3s from fish oils in your natural diet. Fatty fish like salmon, mackerel, herring, lake trout, sardines, and albacore tuna are high in omega-3 fatty acids. You can also get these healthy fats in oil like peanut oil, flaxseed oil, canola oil, and soybean oil.
7.
Choline
What it is: Choline is a chemical similar to B vitamins, and is often lumped in with them. Although choline is not by strict definition a vitamin, it is an essential nutrient and it can help reduce belly fat.
The belly-flattening science: Choline is known to play a role in the metabolism of fat—it breaks down fat for use as an energy source. Because of that, recent studies have shown choline, which is found in large amounts in egg yolks, to play a role in weight loss. A study published in the Journal of the American College of Nutrition found an egg breakfast induced greater satiety and significantly reduced short-term food intake compared to a calorically equivalent bagel breakfast.
Foods to choose: Eggs, peanuts, potatoes, tomatoes, bananas lentils and milk.