Have you ever eaten fast food? Do you know what fast food is? You know that's the Fast food is very harmful to the body. At the present time, Fast food is very popular for people who don't have the time because it is convenient and economical. Fast food restaurants have increased considerably such as McDonalds, KFC, Burger King, and The Pizza Company. Fast foods often contain too many calories and too little nutrition. This is why people who eat fast food tend to have poor physical health.