Serum and urine electrolyte and nitrogenous waste product changes during the renal functional reserve test

Context: Renal functional reserve (RFR) refers to the kidney’s capability to increase its basal glomerular filtration rate (GFR) by at least 20 % after an adequate stimulus, such as a protein overload. As far as we know, no studies have yet reported the behavior of electrolyte excretion during the r...