Fast food is also unhealthy due to its lack of nutritional value as well as the additives and preservatives that are within the food. The ingredients are highly-processed to ensure a longer shelf-life, to keep the ingredients consistent, and to ensure the food products will hold or have enhanced flavor. The additives are essentially chemicals that can damage the cells in the body. It also makes it much harder to digest the food because of the chemicals which causes a much more difficult time for your digestive system. Over working your digestive system can have long-term detrimental effects as well.