**4. Conclusion**

RRF contributes to the clearance of both small and medium-sized solutes. It serves important metabolic and hemodynamic functions, and plays a crucial role in maintaining the cardiovascular health, nutritional status, and well-being of dialysis patients. RRF has also been shown to have a significant impact on the survival of dialysis patients, especially in PD dialysis. Health care providers need to realize that RRF is a very valuable asset to dialysis patients. Efforts to preserve RRF should continue even after patients are started on dialysis treatment, irrespective of the modality used
