Of course fast food can negatively impact your health if you eat it too often. Having a burger, hot dog or pie once or twice a month will not hurt, but some people eat fast food and no other form of main meal. Some even have fast food twice a day!
These people are at risk of heart disease, high blood pressure, gout and diabetes. they are probably obese already but if not, it will come. There are other ways of dying but more importantly, other ways of living. How difficult is it to boil an egg, toss an omelette, or stew vegetables for a nutritious soup!
Once people get into a habit of choosing unhealthy food options at fast food places, this will negatively affect their health. There are many unhealthy options on the menus at fast food places where these foods are fried in heavy oil, use heavy and creamy sauces as well as use preservatives. High salt is also a problem with the fast food restaurants. Every once in a while, these bad foods may be eaten, but it is wise to not make a habit of it.
Eating these calorie-laden foods may cause heart problems, obesity issues and diabetes. These health problems due to poor dieting could make you feel less energetic. Exercise is a part of your health too. Eating bad foods could lead to less energy which could lead to less exercising.