Fast food is inexpensive food like hamburgers and fried chicken that is prepared and served quickly. It contains calories, saturated fat, sugar, sodium, carbohydrates and proteins. Fast food has a high energy density and when people eat it, they do not reduce portion sizes so they consume more calories than needed. This can increase risks of overweight, obesity, diabetes, breast cancer, heart disease, and hypertension. While fast food is convenient and tasty, regular consumption can be unhealthy. People should limit fast food intake and balance it with exercise and water.