Why is fast food bad for the human body?

Fast food is typically characterized as "bad" because, at least in the United States, this category of food tends to be high in sodium, saturated fat and added simple sugars while being low in complex carbohydrates, lean protein and micronutrients like vitamins and minerals. Eating a single fast food meal isn't a big problem, but consistently eating fast food can lead to obesity, high blood pressure, high cholesterol and Diabetes; secondary problems include heart attack, stroke and increased risks for certain types of cancer.