The health body says to make sure you include protein with each meal.
Good sources include chicken breast, tuna, mackerel, salmon, eggs, milk, red lentils, chickpeas, brown bread, nuts and soya.
To maximise the benefits of eating well, you should also engage in regular physical activity.
Any form of exercise for at least 30 minutes a day is good for you but certain exercises have been shown to accelerate belly fat loss.