Derived from cooking down fatty tissue from edible portions of beef carcasses under supervision of USDA Meat Inspection.  It is further refined by running it through separators and filters to remove all traces of solids and moisture.  It is transported in liquid form in rail-cars and taker trucks.  The main use of edible tallow is a frying oil.  It is also used as a shortening in a wide variety of baked goods.