What is the primary purpose of phosphate binders?

The primary purpose of phosphate binders is to prevent phosphorus absorption from meals. In patients with kidney disease, particularly those undergoing dialysis, the kidneys are less effective at filtering excess phosphorus from the blood. Elevated phosphorus levels can lead to various complications, including cardiovascular disease and bone disorders. Phosphate binders work by binding to dietary phosphorus in the gastrointestinal tract, thereby reducing its absorption into the bloodstream. This helps maintain appropriate phosphorus levels, which is crucial for overall health in patients with compromised kidney function.

Increasing bone mass, reducing blood pressure, and enhancing vitamin absorption are not functions of phosphate binders. While managing phosphorus levels can have indirect positive effects on bone health, the primary mechanism of phosphate binders focuses solely on phosphorus management.