Why is high protein intake cautioned against in patients with deteriorating kidney function?

High protein intake is cautioned against in patients with deteriorating kidney function because it accelerates the buildup of waste products in the body. Kidneys play a critical role in filtering waste products resulting from protein metabolism. When protein is consumed, the body breaks it down into amino acids, which are then metabolized, producing nitrogenous waste products such as urea and creatinine.

In individuals with impaired kidney function, the kidneys are less able to excrete these waste products effectively. Consequently, a high intake of protein can lead to an accumulation of these waste products in the bloodstream, resulting in symptoms such as nausea, fatigue, and possibly more severe complications. Therefore, monitoring and potentially reducing protein intake is essential to prevent further deterioration of kidney function and to alleviate the stress on the kidneys.