Botanical Information
- Family: Rhamnaceae
- Common Names: Alder Buckthorn, Black Dogwood, Frangula
- Parts Used: Bark (aged or dried)
Description
Rhamnus frangula, commonly known as Alder Buckthorn, is a deciduous shrub native to Europe, North Africa, and western Asia. Its bark has a long history of use as a gentle laxative and digestive aid. The bark must be aged or heat-treated before use to reduce its anthraquinone content, which can be irritating in fresh form.
Historical and Traditional Uses
- Used in European and traditional Western herbalism for constipation and digestive sluggishness.
- Traditionally employed to stimulate bile flow and support liver function.
- Sometimes included in cleansing and detoxification formulations.
- Used externally in traditional medicine for skin conditions such as rashes and wounds.
Constituents
- Anthraquinone glycosides (frangulin, emodin)
- Tannins
- Flavonoids
- Bitter principles
Actions
- Laxative (Mild to Moderate)
- Cholagogue (Stimulates bile flow)
- Digestive tonic
- Astringent
- Antimicrobial
Medicinal Uses
1. Gentle Laxative Support:
Aged Alder Buckthorn bark is commonly used for occasional constipation, working as a mild stimulant laxative that encourages bowel movement.
2. Liver and Gallbladder Support:
Stimulates bile secretion, promoting digestion and detoxification.
3. Digestive Aid:
Traditionally used for sluggish digestion and bloating.
4. Skin Health (External Use):
Sometimes applied externally in washes for minor skin conditions and irritations.
Preparation and Dosage
⚠️ Note: The bark must be dried and aged for at least one year or heat-treated before use to reduce irritating compounds.
Decoction (Tea from Aged Bark):
- 1 tsp of dried, aged bark per cup of water. Simmer for 10-15 minutes. Drink up to once daily as needed.
Tincture:
- 2-4 ml taken up to twice daily.
Powder:
- 250-500 mg, taken once daily as needed.
Precautions and Contraindications
- Pregnancy and Lactation: Avoid use due to its strong laxative properties.
- Fresh Bark Toxicity: Fresh bark contains active compounds that can cause vomiting and severe cramping; always use aged bark.
- Long-Term Use: Should not be used regularly for more than two weeks to prevent dependency.
- Bowel Disorders: Avoid in cases of inflammatory bowel disease, diarrhea, or abdominal pain of unknown origin.
Energetics (Traditional Medicine Perspectives)
- Traditional Western Herbalism: Bitter and cooling; promotes elimination and detoxification.
- Traditional European Medicine: Used to gently stimulate digestion and cleanse the intestines.
- Ayurveda: Balancing for Kapha but may aggravate Vata in excess.
Combinations
- For Constipation: Combine with licorice root and fennel.
- For Liver Support: Combine with dandelion and burdock.
- For Detoxification: Combine with milk thistle and yellow dock.
Harvesting and Storage
- Harvesting: Bark is collected in spring or autumn and dried for at least one year before use.
- Drying: Spread thinly in a well-ventilated area away from direct sunlight.
- Storage: Store dried bark in airtight containers away from moisture and heat.
Modern Research
Studies confirm Rhamnus frangula’s mild laxative effects and liver-supportive properties, reinforcing its traditional applications.
Alder Buckthorn remains a valuable herb in both traditional and modern herbal medicine, particularly for gentle digestive and detoxification support.