Fast food is high in fat, salt, spices or sugar and other substances harmful to health. But one thing we love about this food and draws its flavor, is that this type of food stimulates the appetite and thirst, which has a strong commercial interest for establishments that provide this food. And this is what makes us follow.
Advantages
They usually have good taste, are inexpensive, can be eaten in a few minutes, do not wash dishes and eat anywhere. We can make a tasty lunch by opening the refrigerator, the ability to keep almost everything in cold facilitates the work in the kitchen and gives sufficient security for its perfect condition.
Disadvantages
If this type of food becomes a habit, the immediate consequences may be: overweight, high cholesterol, increased blood pressure, diabetes or cardiovascular disease.
Humanity has never been available to such a variety of foods to choose and easy to cook, but scientific advances achieved even better treatments for chronic diseases, diabetes, hypertension, cardiovascular disease or cancer, they still remain the same pathologies leading cause of death worldwide, largely due to obesity and Mexico while we're already in the first place.
In fact, fast food is not made with junk. This term is used to describe foods with little of the nutrients the body needs and high in fat, sugar and salt, elements that the body can get over easily. French fries, sweets and fizzy drinks are often considered junk food. If you like these foods, the key is to eat small portions in order to obtain the nutrients the body needs daily.

In my opinion, junk food is not good or bad if that if you consume too much can cause you death a very clear example of Superengordame film in which a documentary about what would happen if you consume any food every days, and its major consequence is death. It should also be careful especially if you are consuming this food try not to eat a daily exercise and eat healthy the other day.