The goal of diet in kidney disease is to maintain optimal nutritional health and to help keep adverse symptoms to a minimum.  Symptoms may include decreased appetite, metallic taste in mouth, tiredness, weakness, nausea and vomiting.  A pre-dialysis diet usually limits protein, sodium, and phosphorus for persons with early stage kidney disease, and weight is monitored to ensure adequate calories are consumed.   In end stage kidney disease, the diet varies based on the type of treatment chosen.  Possible treatments include hemodialysis, peritoneal dialysis, and kidney transplant.  Each person is different and should be evaluated and counseled by a registered dietitian.