You mean to ask about fast foods is healthy to eat or not.
NO, Fast food is loaded with calories from refined sugar and fats ,especially, the saturated and hydrogenated fats, which are repeatedly reheated to high temperatures for frying purposes.It is also very high in sodium(common salt) and other additives.Most important fast food is deficient in dietary fiber and essential micro-nutrients like vitamins and minerals. By eating fast food regularly You will get major risk factor like obesity, hypertension, diabetes, high cholesterol, heart disease, and even many types of cancers.