Some mass-produced pizzas by fast food chains have been criticized as having an unhealthy balance of ingredients. Pizza can be high in salt, fat and food energy. The USDA reports an average sodium content of 5,101 mg per 14 in (36 cm) pizza in fast food chains.[45] There are concerns about negative health effects.[46] Food chains have come under criticism at various times for the high salt content of some of their meals.[47]