Food is the basic need for human beings which, provides energy to the body and protects from diseases. Today, in our diet fast food is common. Fast food is such a type of food that is prepared and served very quickly, but fast food is less nutritious as compared to traditional foods. Fast foods are immensely popular among the younger generation due to commonly available, low cost and easy to carry, but fast food has a much adverse effect on human health. The present paper discusses the reasons for popularising fast food, disadvantages, and effect on human health. The studies showed that fast food contains a high concentration of saturated fat, high calories, and high content of sodium, which leads to overweight, cardiovascular diseases, heart stroke, and diabetic Mellitus. We should keep of the public (children and adolescents) about discouragement of fast food to minimize the life style disorders. This paper represents the prevalence of fast food consumption and identifies the causes of fast food habits along with its impacts on our health.