Strange you should mention chanca piedra! Sent His Holiness an email (wonder if he´ll receive/read it) telling him about the healing properties of Chanca Piedra that i´d downloaded from another site. They also mentioned this same herb has been used for centuries in India, China and any number of other places on the planet where it grows(has different names obviously) for kidney, liver health, as well as dissolving stones, reducing cholesterol, high blood pressure etc. etc. Quite an amazing herb.