The effect of a low-protein diet on serum levels of ceruloplasmin and transferrin in patients with chronic renal failure.

In patients with chronic renal failure the administration of a diet providing 20 g protein per day for five weeks caused a significant rise in the serum ceruloplasmin level. A low dietary copper content (0.8 mg/day) may have been the limiting factor for any further rise of the ceruloplasmin level.