Recent studies have suggested that nephrectomy, either for kidney donation or cancer, is associated with a higher risk of chronic kidney disease (CKD) and end-stage renal disease (ESRD). Patients invariably ask their doctors what to eat to protect the remaining kidney. However, the effect of dietary approaches, such as a low-protein and low-salt diet, for lowering the risk of CKD and ESRD have not been studied in a controlled clinical trial. There are extensive data, however, suggesting that higher protein intake is associated with glomerular hyper-filtration and higher risk of CKD.
The authors of this article suggest slightly lowered dietary protein intake of 0.8-1.0 g/kg per day combined with moderately low sodium diet of less than 4 grams per day. However, further studies are required to support this advise.