Fast food refers to inexpensive and convenient food that can be prepared and served quickly, though it is often high in sodium, saturated fat, and calories. While fast food tastes good, long term consumption can lead to health issues like high blood pressure, heart disease, and obesity due to its high sodium, saturated fat, and calorie content. However, some fast food places now offer healthier options with less trans fat and more fruits and vegetables, and lighter items under 500 calories to provide lower calorie choices.