The USDA regulates food with meat in it. The FDA regulates other food. A frozen cheese pizza is under FDA auspices. A frozen pepperoni pizza is under the USDA.
SD
Thanks. Ok, I became curious because the USDA is regulating 'other food'.
Foods of Minimal Nutritional Value
http://www.fns.usda.gov/cnd/menu/fmnv.htm
(away from desk)