Protein for chronic kidney disease

1.Why is the protein recommendation for chronic kidney disease with a Glomerular filtration rate < 30 ml/min and no dialysis to limit protein? (Hint: answer has to do with developing uremia)

2.What complications from chronic kidney disease Stage 1-4 (not on dialysis) would indicate you need to limit sodium to 2 g/day?

3.What Glomerular filtration rate value would indicate a diagnosis of stage 5 chronic kidney disease (end stage renal failure)? What are the three treatment options? Hint: one is palliative or hospice care.