Research has linked eating nuts to having a lower waist circumference. Nuts are rich in monounsaturated fats, making them a more satisfying pick than pretzels. Make sure you stick to the unsalted versions to stave off sodium-induced puff, and keep in mind one serving is equal to a small handful so go easy on the njugu.2.) ProbioticsProbiotics are 'good' bacteria that help your digestive system break down food, preventing the gastrointestinal issues that can keep you from having a flat stomach. Reasonable servings of natural yoghurt/mala will do you some good.3.) Flax SeedsFull of monounsaturated fats (MUFAs), flax seeds are perfect seeds to introduce into your flat stomach diet. The MUFAs found in flax seeds help bring down your body fat and lower your cholesterol levels. They are easy to bring into your daily routine - a tablespoon of ground flax seeds blend perfectly with your lunchtime salad, or they can be mixed into a flat stomach smoothie or sprinkled over your morning cereal.4.) Whole grainsWhole grains are a fantastic low-fat source of slow-release energy, keeping you going throughout the day. And, thanks to their high levels of fibre, your digestive system will become healthier and more regulated. Ditch the refined chapo, get some Atta chapatis instead.5.) WaterGood o'l H2O! One of the major elements that could be hampering your efforts in achieving that flat belly could be a lack of water in your diet. When you don't have enough fluids in your body, it can make you feel bloated and often worsen the problem. Drinking plenty of water can help leave your stomach looking flatter by curbing your hunger, flushing any toxins through your body, improving your digestive system and getting rid of any fluid retention.