Hyperphosphataemia
Hyperphosphataemia means the phosphate level in the blood is too high. It is most common in people with chronic kidney disease (CKD), where the kidneys can no longer clear excess phosphate efficiently. Left unmanaged, raised phosphate draws calcium out of bones and can lead to vascular calcification over time.
Key points
- Hyperphosphataemia shows up most commonly alongside chronic kidney disease, where the kidneys lose much of their ability to clear phosphate.
- Left untreated, excess phosphate pulls calcium from the bones and can lead over time to calcification of blood vessels.
- Phosphate binders such as calcium acetate are taken with meals to stop dietary phosphate being absorbed into the bloodstream.
Phosphate binders and bone protection
The main pharmacological approach is a phosphate binder taken with meals, which limits how much dietary phosphate is absorbed from the gut. Calcium acetate is one of the most widely used agents in this class; it binds phosphate directly in the digestive tract before it enters the bloodstream. Alongside medication, a low-phosphate diet (reducing processed foods, dairy, and cola drinks) is an essential part of managing levels. Ongoing monitoring through blood tests helps confirm that phosphate stays within a safe range and that bone health is not being compromised.