Foie gras is the liver of goose or duck, the fattening fatten specially. Foie gras is known as the French food best, it a soft appearance and a different taste from the liver of ducks or geese plain. In 2005 worldwide producing foie gras, about 23,500 tons. France is the manufacturer most 18,450 tonnes, or 75 percent of the total. By 96 percent of foie gras of France came from duck liver. And 4 percent came from goose liver. France consumed foie gras in 2005 were 19,000 tons.