Cascara Sagrada
Important Disclaimer
This is not medical advice. Consult a qualified healthcare provider before using any remedy, especially if pregnant, breastfeeding, on medication, or managing a health condition.
Overview
Cascara Sagrada, meaning 'sacred bark' in Spanish, is a small deciduous tree native to the Pacific Northwest of North America. Its bark has been used for centuries by Native Americans as a gentle laxative. The bark must be aged for at least one year (or heat-treated) before use, as fresh bark causes violent purging. Properly aged bark contains cascarosides — anthraquinone glycosides that stimulate intestinal contractions gently and effectively.
Traditional Use
Native American tribes of the Pacific Northwest, including the Nlaka'pamux, Lil'wat, and various Coast Salish peoples, used Cascara Sagrada bark as a laxative and digestive tonic for centuries. Spanish missionaries in California learned of its uses and named it 'sacred bark.' It was introduced to American medicine in 1877 and quickly became one of the most widely used laxatives in the world. It was listed in the U.S. Pharmacopoeia from 1890 to 1975 and remains official in many pharmacopoeias worldwide. Eclectic physicians valued it as a gentle, non-habit-forming laxative that also toned the bowel.
Key Active Compounds
Cascarosides A & B
The primary active anthraquinone glycosides unique to Cascara Sagrada, stimulating peristalsis in the large intestine and promoting bowel movements without cramping.
Emodin
An anthraquinone with laxative, anti-inflammatory, and potential antiviral properties; contributes to the bark's overall laxative effect.
Aloe-Emodin
A hydroxyanthraquinone that stimulates intestinal motility and has demonstrated antimicrobial and anti-inflammatory activity in laboratory studies.
Tannins
Astringent compounds that help tone the bowel wall and may counterbalance the laxative effect, contributing to the herb's reputation as a bowel tonic.
Evidence-Based Benefits
Gentle Laxative
StrongClinically proven to relieve constipation by stimulating peristalsis in the large intestine; considered one of the gentlest herbal laxatives available.
Bowel Tonic
TraditionalTraditionally used not just as a laxative but as a tonic to improve overall bowel tone and function over time.
Digestive Bitters
TraditionalThe bitter compounds stimulate digestive secretions, supporting overall digestive function beyond simple laxative action.
Liver Support
TraditionalTraditionally used to support liver and gallbladder function, stimulating bile flow and supporting fat digestion.
Common Preparation Methods
Bark Tea (Decoction)
Simmer 1 teaspoon of aged dried bark in 1 cup of water for 10-15 minutes. Strain before drinking. Use only properly aged bark (minimum 1 year old).
Dosage: 1 cup in the evening before bedEffects typically occur 6-8 hours after consumption; start with a small amount to assess sensitivity
Tincture
Use aged dried bark in a 1:5 ratio with 50-60% alcohol. Macerate for 4-6 weeks, shaking daily. Strain.
Dosage: 1-2 ml in the eveningEnsure bark is properly aged; fresh bark tincture causes violent purging and should never be used
Standardized Extract (Capsules)
Use a commercially prepared standardized extract containing 20-30 mg of hydroxyanthracene derivatives per dose.
Dosage: As directed on product label, typically 1-2 capsules before bedStandardized products offer consistent dosing; do not use for more than 1-2 weeks continuously
Safety & Cautions
Please read carefully before use
Contraindications
- Pregnancy and breastfeeding (stimulant laxatives can cause uterine contractions)
- Inflammatory bowel disease (Crohn's disease, ulcerative colitis)
- Intestinal obstruction or abdominal pain of unknown origin
- Children under 12
- Kidney disease
- Fresh (unaged) bark — must use only properly aged bark
Drug Interactions
- May interact with cardiac glycosides (electrolyte imbalance from laxative effect)
- May interact with diuretic medications (potassium depletion risk)
- May reduce absorption of oral medications (take 2 hours apart)
- May interact with antiarrhythmic medications
Possible Side Effects
- Abdominal cramping (especially with higher doses)
- Electrolyte imbalance with prolonged use
- Dependency with long-term use (bowel may become reliant on stimulant laxatives)
- Discoloration of urine (harmless, turns yellow-brown)
- Melanosis coli (harmless darkening of colon lining with prolonged use)
Special Populations
- Not recommended during pregnancy or breastfeeding
- Not recommended for children under 12
- Avoid in inflammatory bowel conditions
- Use for short periods only (1-2 weeks); consult healthcare provider for chronic constipation
Sources & References
National Center for Biotechnology Information
Native American Ethnobotany Database
Quick Reference
Rhamnaceae
Aged bark
Intensely bitter, slightly sweet, astringent
Safety First
Always consult with a qualified healthcare provider before starting any new remedy, especially if you have existing health conditions or take medications.