Chanca Piedra is an herbal plant, and has been the subject of research for its amazing medicinal properties for over four decades. This wonder herb has a long history for having been used to treat patients with various kinds of ailments all over the world, wherever it is found growing. It is mainly used to treat many types of urinary and bilary conditions to include kidney and gallbladder stones, to treat hepatitis, colds, flu and viral infections. Chanca Piedra is also used as an herbal medicine to treat gall stones, and an 'in vivo' study using rats, Indian researchers found that bile acid secretion in the gall bladder increased and blood cholesterol levels lowered significantly when the herb was used. A German doctor, Dr Wolfram Wiemann, treated over a 100 patients with kidney stones with Chanca Piedra obtained from Peru, and found it to be successful in eliminating kidney stones in a couple of weeks in 94 percent cases.