Cascara sagrada is the properly aged bark of Frangula purshiana, a North American tree whose Spanish name means “sacred bark.” It is a stimulant laxative with a specific short-term bowel tradition. Aging and preparation matter: fresh bark is not the customary medicinal material.
Traditional Uses & Why Herbalists Value It
North American and later pharmacopoeial practice uses properly aged cascara bark for occasional constipation. Herbalists often pair its strong bitter bark with aromatic ingredients. Its bowel-stimulating action is different from the water-holding bulk supplied by psyllium or flax.
What Modern Research Has Found
Defined cascara preparations have a recognized short-term stimulant-laxative action. Cascarosides are converted to active metabolites in the bowel. Aging, standardized exposure and brief use are central to the monograph's preparation requirements.
Plant Part, Preparation & Natural Constituents
Cascarosides are characteristic anthranoid glycosides. Use requires properly aged or processed bark and defined directions. Cramping and diarrhea can occur; prolonged use can cause fluid and electrolyte problems. Pregnancy and unexplained abdominal pain require professional review.
Sources & Further Reading
