I had slightly reduced kidney function at my last blood test and wanted to see if I can improve it. Besides the obvious like keeping blood sugar under control , lower protein diet etc etc I started drinking nettle tea on a daily basis.
Nettle tea supposedly has kidney cleansing properties which may lead to improved functionality , according to a number of sources. I have my next blood test tomorrow , with results a week tomorrow so I'll see if 6 months of nettle tea has had any impact.