Pure chancapiedra in capsules. Chancapiedra is a small wild shrub that grows in the rainforests of the Amazon. It is currently used as a dietary supplement, especially for kidney stones. Instructions for use Take 1 to 2 Chancapiedra capsules a day for two or three weeks in a row, with one week of rest. Repeat the process. It is not recommended to extend the use for more than 3 months. Ingredients Phyllanthus niruri