In case of elevated urea nitrogen, it is common in patients with kidney disease or renal insufficiency. You can eat thin rice, noodles, tofu, milk, eggs, duck eggs, goose eggs, beef, lean meat, fish and shrimp, etc. Food should be in moderation not to overeat. In addition to maintain adequate vitamin intake, you can eat more vegetables and fruits, such as more apples, radishes, potatoes, bananas and other foods, remember not to eat spinach. The diet requires low salt, low fat, low phosphorus and low purine diet, to eat lightly and avoid spicy, stimulating, greasy food and high fat food. To limit the intake of purine, eat less animal offal, to reduce the total calorie intake of food, do not eat too much to prevent overweight. Normally, you should also drink more water and urinate more, and keep the daily water intake at about 1500-2000 ml.