There are many changes in everybody's life that make life easier every day. The food technology has also developed a lot and the culinary source is increasingly diverse . Convenience foods are also thriving and are used every day and by some as a substitute for meals. Fast food is very convenient but it also adversely affects everyone's health. Fastfood is very easy and benefits people a lot with morning meals. fastfood is packaged food which needs only to be reheated in order to be used.It supports those with small children, such as office employees and parents. When preparing meals, it takes relatively little time. Fast food in Vietnam is diverse since bread is one of the most common fast foods and is preferred for breakfast by many individuals. There are also a range of fast foods from many other nations, such as hamburgers, fried bread, etc. Quick eating, on the other hand, is often detrimental to the wellbeing of people as they use it every day, becoming a long-term habit in the future. Obesity and the primary cause of kidney failure are the condition that occurs better when consuming fast food. Since there are many carbohydrates and fats in fast food that are actually dangerous to the human body and include a lot of processed salt that traps water in the body, which induces kidney failure. Fatty liver disease in the body can be caused by the fats in fast foods, such as fried snacks, fried chicken and chips. To sum up, for all, fast food is both beneficial and timesaving. If used in an abusive and indiscriminate fashion, however it can damage our bodies.