Nowadays,when our society is in the stage of rapid transformation, a tendency to become fast food common among people can be observed. It is agreed, that the main advantage of this issue is the appearance of the ability to spend less time cooking; while the main drawback is the harm which this kind of food provides to our body. This essay,firstly,will discuss what positive developments encourage people to eat fast food,followed by an analysis of reasons why it is considered to be harmful.