Buckthorn Bark (Rhamnus cartharica): The Cleansing Laxative

By Anjela Jeganathan – Holistic Medical Herbalist | Herba Naturalle

Buckthorn — Rhamnus cartharica (also Rhamnus cathartica) — is a thorny shrub native to Europe and Western Asia, found in hedgerows and scrubland across Britain. Its bark and berries have been used as a laxative since at least the 9th century, and it was included in European pharmacopoeias for centuries as one of the standard remedies for constipation. The species name cathartica derives from the Greek for “purifying” — reflecting both its laxative action and its historical role in the broader humoral concept of cleansing the body of excess bile and toxic accumulation.

At Herba Naturalle, Buckthorn Bark is listed in the comprehensive herb index as a stimulant laxative herb requiring careful clinical use. The Digestive Reset Bundle provides a more comprehensive and sustainable approach to bowel regularity.

Active Compounds

• Anthraquinone glycosides — rhamnosides (emodin, chrysophanol, physcion); converted by intestinal bacteria to active anthrones that stimulate bowel movement by increasing water secretion into the bowel and stimulating peristalsis
• Flavonoids — quercetin, kaempferol derivatives
• Tannins — with mild astringent activity

Clinical Applications

Constipation

The primary and well-established application. Buckthorn Bark stimulates bowel peristalsis through the anthraquinone mechanism — producing a bowel movement typically 6–12 hours after ingestion. It is used for short-term relief of constipation when gentler measures (dietary fibre, hydration, exercise) have been insufficient.

Bowel Preparation

As a bowel-stimulating herb, Buckthorn has traditional use in clearing the bowel before investigation or in the context of broader detoxification protocols.

Liver and Gallbladder

The emodin content provides mild choleretic (bile-stimulating) activity — relevant where constipation is associated with sluggish liver and gallbladder function. The Berberis Plus provides more targeted hepatic support.

⚠ Safety — Important

• Short-term use only: Not suitable for use beyond 1–2 weeks without professional guidance
• Laxative dependence: Prolonged use of anthraquinone laxatives can impair normal bowel function
• Pregnancy and breastfeeding: Contraindicated
• Children: Not recommended under 12 years
• Inflammatory bowel disease, intestinal obstruction, appendicitis: Contraindicated
• Fresh bark: Must be aged at least one year before use — fresh bark is emetic and toxic

For sustainable bowel health, explore the Digestive Reset Bundle. Browse the full herb index and contact the clinic. The full product range is available online. Learn about the herbal medicine philosophy at Herba Naturalle.

This article is for informational purposes only. Please consult a qualified medical herbalist before use.