If you have been working out to get flat abs, it is important that you know that if you spend all your day at the gym, but don’t eat the right foods, you may not get desired results.
Your diet plays a significant role in your weight loss journey; you have to eat right if you crave that sexy body.
Foods to incorporate into your diet if you want a flat belly
These foods are healthy and have been proven to aid in weight loss in the stomach area. A flat belly is a feature of a great body.
Almonds
Almonds contain filling protein and fibre, not to mention vitamin E, a powerful antioxidant. 
Almonds are also an excellent source of magnesium, a mineral your body must have to produce energy, build and maintain muscle tissue, and regulate blood sugar. 

What makes almonds most impressive is their ability to block calories. Research shows that the composition of their cell walls may help reduce the absorption of all of their fat, making them an extra-lean nut.
Eat an ounce a day (about 23 almonds), with approximately 160 calories. An empty Altoids tin will hold your daily dose correctly.
Eggs
Dietitians highly respect eggs because of their balance of essential amino acids which are protein building blocks used by your body to manufacture everything from muscle fibres to brain chemicals.
Researchers at the Pennington Biomedical Research Center report that when people ate eggs in the morning, they felt less hungry throughout the day than when breakfast consisted of complex carbohydrates like bagels. 
Eat an egg a day, unless you have high blood cholesterol, in which case you should check with your doctor first. (One egg packs about 213 milligrammes of cholesterol.)
Berries
Most berries are loaded with fibre, every dieter’s best friend. 
Experts say the more fibre you eat, the fewer calories you absorb from all the other stuff you put in your mouth. That’s because fibre traps food particles and shuttles them out of your system before they’re fully digested. 
Berries are also high in antioxidants, which not only help protect you from chronic diseases like cancer but may also help you get more results from your workouts. 
Eat at least half a cup daily, or about 30 calories’ worth. Don’t limit yourself to the usual suspects, like raspberries, blueberries, and strawberries. Add boysenberries, gooseberries, and black currants to the mix for excitement.
Leafy Greens
Their low-calorie count definitely will shrink your waistline. A cup of spinach contains only about 40 calories, while a cup of broccoli has 55 calories and satisfies 20 percent of your day’s fibre requirement. 
Most leafy greens are loaded with calcium, an essential ingredient for muscle contraction.
In other words, they help fuel your workouts.
Eat three servings daily. 
Yoghurt
According to a recent research published in the International Journal of Obesity, people who get their calcium from yoghurt rather than from other sources may lose more weight around their midsection.
The probiotic bacteria in most yoghurts will help keep your digestive system healthy, which translates into a lower incidence of gas, bloating, and constipation, which can keep your tummy looking flat.
Eat one to three cups a day of low-fat or fat-free yoghurt.
When choosing yoghurt, choose unsweetened yoghurt that contains live active cultures. 
Add a handful of chopped fresh fruit for flavour and extra fibre.