Fast food. Artwork of a beefburger sandwich with cheese and salad, served with chips and a packet of ketchup. The beef patty will contain processed minced meat that may have had salt added. Both the beefburger and the chips may also have been fried, increasing the amount of fat they contain. Diets high in fat and salt are not healthy, as salt can raise blood pressure and fat can cause obesity and also clog the arteries, increasing the risk of a heart attack or stroke.