I had to go off most of my supplements recently til my ulcer heals and am now having kidney and adrenal issues so am searching for something to heal my kidneys. I am getting desperate.
I've read years ago of many people healing kidney failure as well as infections by drinking their urine or urine of someone else, however most of the testimonials have been removed from the web.
There is a UT forum here on curezone, as disgusting as it sounds you may want to look into it. I'm seriously thinking of doing it.
I also found this article if you are having thyroid issues there is a connection to the kidneys:
Thyroid hormones control the rate at which your kidneys can do their filtration work. Thus, if thyroid function is impaired, kidney function is similarly impaired. Thyroid hormones are involved in the development and growth of the kidneys, especially in the womb. Leptin and thyroid problems during pregnancy result in less than optimal kidney development in the child, setting the stage for life-long thyroid and kidney struggles. The kidneys also activate thyroid hormone, converting T4 to T3, though your liver is the main organ that performs this function.
Chief nutrients that help the kidneys are antioxidants such as Q10, silymarin, grape seed extract, and r-alpha lipoic acid. Minerals such as magnesium and potassium are also needed for healthy kidney function. More advanced kidney distress may call for higher amounts of nutritional anti-inflammatories like quercetin, bromelain, and curcumin; antioxidants like NAC, vitamin C, and carotenes; and buffering compounds like glutamine.
Improving kidney function will help improve thyroid function and vice versa, and such improvements will invariably support improved cardiovascular health. Do what you can to reverse small problems before they develop into larger ones. Know your symptoms and know your remedies.