I've been using this specific program for almost two years now (thanks to Mike suggestion).
This program describes how a good diet - avoiding certain foods and replacing them whit healthier ones - supported by herbal supplements can stop and even reverse kidney disease.
Before starting this program I had my blood tested regularly, my GFR was 26 - Stage 4 Kidney Disease. After starting this program it took just a year to go from 26 to 65!
This program really works.