The kidneys are vitally important organs for health and well-being.The kidneys when healthy and strong do their job which entails various functions.One of the common health conditions that people can experience with compromised kidney health is kidney stones.Blueberries are high in antioxidants and boost immunity. Dandelion, parsley, celery and asparagus flush out uric acid and are natural diuretics. Barley and millet cleanse the kidneys and lower inflammation.Cranberry Juice. Cranberry juice has been touted for years as support for the urinary tract. Beet Juice. Beets and beet juice contain betaine, a very beneficial phytochemical.