Post date: May 15, 2012
Protein and phosphorus are not "hard" on normal kidneys. The kidney has many normal mechanisms for dealing with normal amounts of protein and phosphorus that is taken in with the diet. As kidneys fail, especially after they reach advanced stages of chronic kidney disease (CKD), protein and phosphorus are not handled as well. If someone has Stage 4 or 5 CKD, with an estimated glomerular filtration rate (eGFR) of less than 30 milliliters per minute per 1.73 meters squared, then the kidneys have a harder time dealing with dietary protein and phosphorus. These levels are monitored and diets sometimes have to be adjusted. I recommend that patients consult with a dietitian at that point.