The waist of pigs contains proteins, fats, carbohydrates, calcium, phosphorus, iron and vitamins, etc., which are reductive and renal gas. The kidneys, bladders, stifling and drying-out of pigs with nutritional value. It can be used to treat kidney pain, oedema, deafness, etc. The general population can eat the acreage pains, rejuvenations and sweat robbers that fit the kidneys of the elderly; the deaf and ringing of the ears of the elderly; and the diets of those with high blood resin and high cholesterol。