Research overview: dietary phosphorus restriction in feline CKD

Controlling blood phosphorus through dietary restriction and phosphate binders is a cornerstone of CKD management in cats, supported by evidence that phosphorus retention drives mineral and bone disorder, vascular and soft-tissue calcification, and progression of kidney disease. Renal diets formulated with reduced phosphorus, along with binders when diet alone is insufficient, aim to keep phosphorus within stage-appropriate targets. This overview compiles the nutritional and clinical literature rather than one source, describing the physiology linking phosphorus retention to disease progression, why phosphorus control is among the best-supported interventions for prolonging survival, and how binders and diet are combined in practice. It matters because phosphorus management is one of the most impactful levers clinicians have to improve quality and length of life in affected cats.