A healthy kidney diet should contain protein, fat and carbohydrates, states the American Kidney Fund. Iron is also necessary, since many kidney disease patients suffer from anemia. People with severe kidney disease should limit the amount of fluids they take.
Kidney disease patients need to make dietary changes that limit salt, potassium, fluids and phosphorous and eat enough calories to boost weight, according to Drugs.com. A patient should avoid too much sodium since it makes a person thirsty, raising the blood pressure. This, in turn, can damage the kidneys further. Patients should seek the help of a dietitian in creating a diet plan that suits their health needs.