Study on Humans and Rats in Brazil 1990

The first notable study of Chanca Piedra was made 1990 in Sao Paulo, Brazil. It was made on humans and rats. They were given chanca piedra tea for 1-3 months and it was reported that the tea promoted the elimination of stones. After this study Chanca Piedra become known among doctors as a natural remedy against bladder stones and also sold in many pharmacies in Brazil. The study can be found here: