It's no secret - most types of fast food are bad for you. In the past, fast food was considered a special treat, something to enjoy on a date or a family night out. Nowadays, more and more people around the world are frequently relying on fast foods as a regular source of meals. Most Americans already have diets that are too high in calories, fat and sodium. Eating fast food more than occasionally can cause a decrease in your overall level of health and nutrition.