Food is an essential component of human life since it provides the body with fuel and acts as a defence mechanism against disease. These days, a lot of people get their meals from fast food restaurants. In spite of the fact that it may be prepared and brought to the table in a shorter amount of time, the nutritional density of junk food is lower than that of traditional cuisine. Even though the convenience, low cost, and portability of fast food make it highly popular among younger people, it has a number of negative effects on human health that make it less desirable overall. Unfortunately, the precautions that have been taken are not adequate. The consumption of unhealthy fast food is one of the primary factors contributing to the rise in the prevalence of many diseases in developing countries, such as coronary artery disease and diabetes mellitus, amongst others. The research that was done on the potential dangers to one's health that are related to such high-calorie meals gave some useful insight into how one should prevent them. This paper discusses the reasons for the widespread consumption of fast food, as well as the difficulties associated with it and the toll it takes on people's physical well-being. According to studies, junk food contains a significant amount of saturated fat, in addition to a large number of calories and salt, all of which may contribute to the development of health problems such as obesity, coronary artery disease, and diabetes mellitus. We need to continuously remind the general population, and particularly children and teenagers, not to consume junk food in order to lower the rate of lifestyle-related illnesses. This paper discusses the number of individuals who consume junk food as well as the factors that lead to their making that choice. It also talks about the bad things that may happen to our bodies when we eat junk food.