Natural Factors Cascara Sagrada - Traditionally used as a laxative. This herbal medicine is used for short-term relief of occasional constipation and to promote bowel movement. Cascara Sagrada helps to promote painless evacuations and, after extended usage, the bowels will function naturally and regularly from its tonic effects. Cascara is very valuable for hemorrhoids due to poor bowel function. It is cleansing to the colon and helps rebuild its functions. Cascara has often been recommended as part of cleansing and detoxifying programs and in small doses it may be an effective liver tonic.