Hyperphosphatemia and Chronic Kidney Disease
What is Hyperphosphatemia with Chronic Kidney Disease?
Hyperphosphatemia is a common condition in people with chronic kidney disease (CKD), particularly in advanced stages, in which phosphorus builds up in the blood due to reduced kidney function.
Healthy kidneys help keep phosphorus levels in balance by filtering out excess amounts. For CKD patients on dialysis, a common treatment goal is to keep phosphorus levels at 5.5 mg/dL or less, while the latest guidelines define the normal range as 2.5-4.5 mg/dL.
Symptoms and Patient Experience
High phosphorus levels often do not cause noticeable symptoms, especially in the early stages. Most cases are identified through routine blood tests.
When symptoms do occur, they are typically related to chronic kidney disease or long-term mineral imbalance rather than phosphorus levels alone. These may include itching — particularly in people receiving dialysis —muscle discomfort or fatigue, and general bone or joint discomfort
Hyperphosphatemia and CKD At a Glance
Kidney disease affects an estimated 37 million people in the U.S.1
There are more than 550,000 patients with CKD on dialysis in the U.S.2
The kidneys play a key role in regulating phosphorus levels
About 9 in 10 adults aged 20 or older with CKD did not know they have CKD.1
Nearly 70% of people with chronic kidney disease (CKD) on dialysis who are treated with a phosphate binder still struggle to get to goal and stay there.3
Hyperphosphatemia contributes to the development of plaques in the body.
Why High Phosphorus Matters
Even when symptoms are not noticeable, elevated phosphorus levels can affect the body over time. These changes develop gradually and are linked to long-term kidney disease rather than short-term symptoms. Most often, the impact is felt across multiple systems, including:
Bones
Bones Changes in how bone is broken down and rebuilt, which can weaken bone structure
Blood vessels
Buildup of calcium and phosphorus in vessel walls, which can reduce flexibility
Heart and circulation
Higher risk of cardiovascular complications in people with CKD
Ivan’s Story
Living with CKD with Hyperphosphatemia
Ivan’s lifelong journey with chronic kidney disease spans dialysis, kidney failure, and strict phosphorus management, culminating in a renewed sense of freedom after a successful transplant.
Watch HereManaging Hyperphosphatemia
Management focuses on lowering phosphorus levels while also addressing the underlying kidney disease. Treatment is individualized and may include diet, dialysis, and medication.
Dietary management
Food choices play an important role. Common dietary approaches include limiting foods high in phosphorus, avoiding processed foods with added phosphates, and following a balanced diet with guidance from a healthcare provider or dietitian.
Most patients find managing hyperphosphatemia through diet alone very challenging.
Dialysis
In advanced CKD, dialysis helps remove phosphorus from the blood. However, it is often not enough on its own to keep levels within range.
Medication
Phosphate lowering therapies may be prescribed to reduce phosphorus absorption in the digestive tract.
References
- Centers for Disease Control and Prevention. Chronic Kidney Disease in the United States, 2023. Atlanta, GA: US Department of Health and Human Services, Centers for Disease Control and Prevention; 2023. https://www.cdc.gov/kidney-disease/php/data-research/index.html
- Kidney disease: Fact sheet (2026) National Kidney Foundation. https://www.kidney.org/about/kidney-disease-fact-sheet
- This information comes from patient charts reviewed between 2019 and 2023. The charts looked at about 1,000 patients on dialysis each year who were also taking phosphate binders. The target phosphorus level was 5.5 mg/dL or lower. At least one phosphorus level was above 5.5 mg/dL during the 6-month review.
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