When your kidneys are healthy, they know how much phosphorus your body needs and are able to remove the extra phosphorus that is ingested from the foods you eat. When you have CKD, your kidneys don’t work as well at removing phosphorus on their own. As a result, phosphorus levels in the blood rise. When your phosphorus levels are too high, you develop hyperphosphatemia (high phosphorus). If you have hyperphosphatemia and CKD and are on dialysis, the goal should be getting your phosphorus levels towards a normal range. Learn more about living with hyperphosphatemia.