Cascara Sagrada Bark and Powder Profile

Also known as- Rhamnus purshiana, Bitter Bark, Buckthorn, California Buckthorn, Cascara Sagrada, Chittem Bark, Dogwood Bark, Purshiana Bark, Rhamni Purshianae Cortex, Sacred Bark, Sagrada Bark, Yellow Bark, Frangula Purshiana.


Cascara sagrada is a deciduous of the American Northwest, ranging from northern California to the Alaska panhandle in moist forests below 5,000 feet (1,500 m). It is also found in the Rockies of Idaho and Montana. The herb is harvested in the form of quills and pieces of bark, allowed to age at least a year before use in laxative preparations.Cascara sagrada is never to be used fresh and It must be aged for at least a year to break down its anthrone chemicals. (The Cascara offered by Mountain Rose Herbs is aged) If the bark is not aged it is a purgative and will cause intense intestinal spasms and vomiting. The herb can be artificially aged by heating but some useful constituents may be lost.


1,8-dihydroxy-anthracene derivatives (in the aged bark), aloe-emodin, frangulin-emodin, flavonoids, and tannins.

Parts Used

Properly aged bark (generally 1 year)

Typical Preparations

Tablets and extracts. Teas are hard to drink but have a gentler laxative action.


Even conventionally oriented physicians often recommend cascara sagrada to patients suffering constipation after surgery for hemorrhoids. The 1,8-dihydroxy-anthracenes in cascara sagrada act on the nerves in the intestinal tract, numbing the nerves that hold back stool and stimulating the nerves that propel stool downward. If you experience cramping, you've used too much.


For occasional use only as it is a bulk forming laxative and should be taken with adequate fluids.
You should not use Cascara Sagrada or any other laxative if you have appendicitis, Crohn's disease, or ulcerative colitis. Not recommended for children under 12. Unlike buckthorn, cascara sagrada is not known to be safe for pregnant women and nursing mothers.


This herb is sold by the ounce is Copyright © 2000-2023