- Rhamnaceae
- Bark
- North America
- Dried bark, for infusion
Cascara Sagrada Bark
Rhamnus purshiana
Select sizeThe plant
Cascara comes from a North American tree. Properly aged or processed bark is used in medicinal preparations.
What's in it
Cascarosides are compounds that become active in the large bowel. They belong to a group of plant substances with laxative effects.
How it works
Bowel movement: Cascara stimulates the muscular movement that pushes stool through the large bowel. Softer passage: It also changes how the bowel handles water and salts, helping keep more water in the stool. Together, these actions explain its use for occasional constipation.
In the tradition
A North American bark later adopted into Western herbal medicine.
Cascara sagrada is Spanish for sacred bark.
- 1Simmer 1–2 tsp of dried cascara sagrada bark in 500ml water for 15–20 mins, then strain.
- 2Drink 1–2 cups daily.
- 3Bitter taste — blend with ginger, liquorice root, or honey to improve palatability.
Storage: Store in an airtight container in a cool, dry place away from sunlight. Best used within 12–24 months.
- Short-term use only, maximum one week without medical advice.
- Avoid during pregnancy, breastfeeding, under age 12, bowel disease, unexplained abdominal pain or dehydration.
- Can cause cramps and diarrhoea.
- Inflammatory bowel conditions (Crohn’s, colitis, IBS): may aggravate.
- Abdominal pain or obstruction of unknown cause.
- On heart or diuretic medication: electrolyte loss may interact.
- Long-term use without breaks: may cause laxative dependency.
A food supplement, not a substitute for a varied diet. Speak to your doctor before use if you are pregnant, breastfeeding or taking medication.
Common questions
How do I prepare cascara sagrada bark?
Cascara Sagrada Bark is simmered as a decoction rather than steeped. Simmer 1–2 tsp of dried cascara sagrada bark in 500ml water for 15–20 mins, then strain. Full directions are in the How to use panel above. See also: Infusion vs decoction.
What is cascara sagrada bark?
Cascara Sagrada Bark (Rhamnus purshiana) belongs to the Rhamnaceae family; the bark is used. Origin: North America. A specialist bark used for short-term relief of occasional constipation.
How should I store dried cascara sagrada bark?
Store in an airtight container in a cool, dry place away from sunlight. Best used within 12–24 months.
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