Elderly people with renal atrophy first of all, diet and nutrition should pay proper attention to eat a high quality low protein diet, if combined with hypertension, must control the salt, carry out a low-fat diet, that is, the fat content is relatively high, must eat less. Be sure to quit smoking and alcohol, and do not abuse drugs, especially those with renal impairment, do not just eat. Kidney function tests, if kidney failure, long-term dialysis treatment is required. Avoid foods high in potassium and phosphorus, mainly fruits, high in phosphorus, mainly dried fruits and nuts, meat and dairy products are high. Avoid foods high in potassium, and frequently test your blood potassium, anemia indicators, kidney function indicators, and electrolytes.