(Rhaumnus purshiana) Cascara sagrada has been used traditionally by Native Americans for washing the bowel, and one of the best herbs available to cure chronic constipation. The superior kind of laxative qualities offered by cascara sagrada makes it a wonderful colon cleansing herb. It has this ability because its bark is rich in hormone-like oils which promote peristaltic action in the intestinal canal. The effectiveness of this colon cleansing herb is normally attributed to anthraquinone. Anthraquinone helps in peristalsis – an action to do with contracting the colon walls that gives you an urge to go. Cascara Sagrada helps achieve painless evacuations and , after extended usage, the bowels will function naturally and regularly from its tonic effects. It also has a stimulating tonic effect on all nerves it comes in contact with. This herb helps increase secretions of the stomach, liver, and pancreas, and has been effective in helping the body rid itself of gallstones. Cascara Sagrada contains vitamin B-complex, calcium, potassium, manganese, and trace of tin, lead, strontium, and aluminum.