The following information outlines dietary recommendations for kidney-related illnesses:
Patients with chronic kidney disease may require a number of modifications in their diet including reductions in sodium, potassium, phosphorous, and protein. Please ask your physician to see what restrictions if any are needed.
National Kidney Foundation
National Kidney Foundation nutrition information
Kidney School
Some patients with hypertension may benefit from diets low in sodium and rich in potassium.
Ask your physician to see if this diet is right for you:

National Institute of Diabetes Digestive and Kidney Disease
American Diabetes Association, Understanding Carbohydrates
American Heart Association, lowering sodium intake