Although pig's waist has the effect of tonifying kidney and strengthening body, it has certain curative effect on diseases such as kidney deficiency, low back pain, edema, nocturnal emission, night sweat and deafness of the elderly. Children need nutritious food, but they can't eat it. Give it to them reasonably. If children don't eat meat, it is easy to cause anemia. Doctors and children need at least 30 to 50 grams of meat every day. Eating too much pork loin is not good.