How true eggwhite is not good for patient who has impaired kidney function?

See answer: In general, patients with impaired renal function need to limit their total protein intake and 60% of their daily protein intake should be high quality protein. Egg white is a good and common source of high quality protein which can meat the basic physical demand and meanwhile produce less urea nitrogen which needs to be discharged by kidney. Avoid or limit egg yolk because of cholesterol content.