Kidney disease changes how your body absorbs and eliminates vitamins and minerals. The National Kidney Foundation and the American Dietetic Association both note that CKD patients are at risk of malnutrition and nutrient imbalance. Many over-the-counter multivitamins contain potassium, phosphorus, and vitamin A at levels your doctor has told you to limit — plus undisclosed "proprietary blends" that haven't been studied in kidney patients. ProRenal® +D is formulated to avoid all of it, using doses aligned with KDOQI clinical guidelines.