The best foods for your kidneys range from various types of berries, egg whites, fish, fruits and vegetables. There are many varieties of foods that may best contribute to kidney health, such as zucchini, string beans, olive oil, rainbow trout, and many more.A kidney friendly diet is very important to those with chronic kidney disease to be able to stay healthier. Kidney disease can be linked to diabetes, heart disease, high blood pressure and any one aged older than 60. Risks can involve obesity, autoimmune diseases and urinary tract infections. By eating right and staying hydrated, there can be an improvement in kidney function to better your overall health.