In the clinical care of renal patients, nutritional therapy is very important. Since the early
stages of CKD, “ normalization” of dietary intake of energy, protein, sodium and phosphorus
play a crucial role for the renal protection. In more advances stages of CKD, protein-restricted
diets are able to prevent or ameliorate uremic symptoms or complications, such as metabolic
acidosis, mineral and bone disorders, insulin resistance, proteinuria, hypertension and fluid
retention, and to maintain nutritional status [1-3]. Evidence exists that protein-restricted
diets can delay the need of dialysis [4] , whereas the effect of slowing the rate of GFR decline
is not so evident [5].