Botanical Information
- Family: Parmeliaceae
- Common Names: Iceland Moss, Lichen Islandicus
- Parts Used: Whole lichen
Description
Cetraria islandica is a lichen native to Arctic and alpine regions, particularly in Iceland and Scandinavia. It has been traditionally used as a nutritive tonic, respiratory remedy, and digestive aid. Iceland Moss contains mucilaginous compounds that soothe irritated mucous membranes and bitter principles that stimulate digestion.
Historical and Traditional Uses
- Used in Scandinavian and Icelandic medicine for respiratory conditions like coughs and bronchitis.
- Traditionally consumed as a food source in times of famine.
- Employed as a digestive tonic to support appetite and gastrointestinal health.
Constituents
- Lichenin (a polysaccharide)
- Usnic acid
- Bitters (lichen starch)
- Mucilage
- Minerals
Actions
- Demulcent
- Expectorant
- Bitter tonic
- Antimicrobial
- Nutritive
Medicinal Uses
1. Respiratory Health:
Iceland Moss is traditionally used to ease coughs, bronchitis, and irritation in the throat and lungs.
2. Digestive Support:
Its bitter principles stimulate digestion and appetite, making it useful for weak digestion or convalescence.
3. Immune Support and Antimicrobial Action:
Usnic acid has been studied for its antibacterial and antifungal properties.
4. Nutritional Tonic:
Rich in mucilaginous compounds, Iceland Moss has been used as a survival food and general strengthener.
5. Mucous Membrane Support:
Soothes inflammation in the gastrointestinal and respiratory tracts, beneficial for ulcers and gastritis.
Preparation and Dosage
Decoction (Tea):
- 1-2 tsp of dried lichen per cup of water. Simmer for 10-15 minutes and drink up to 3 times daily.
Tincture:
- 2-5 ml of tincture taken up to 3 times daily.
Poultice or Wash:
- Strong decoction applied externally for skin conditions and wound healing.
Precautions and Contraindications
- Pregnancy and Lactation: Use with caution due to its strong bitter properties.
- Usnic Acid Sensitivity: May cause liver toxicity in excessive doses; use in moderation.
- Thyroid Conditions: Some lichens may interfere with thyroid function; consult a healthcare provider before use.
Energetics (Traditional Medicine Perspectives)
- Traditional European Herbalism: Cooling and soothing; supports weakened digestion and lung function.
Combinations
- For Respiratory Support: Combine with marshmallow root and licorice.
- For Digestive Health: Combine with gentian and fennel.
- For Immune Support: Combine with echinacea and reishi mushroom.
Harvesting and Storage
- Harvesting: Collected from clean, unpolluted environments in the wild.
- Drying: Air dry in a well-ventilated, shaded area.
- Storage: Store dried lichen in an airtight container away from moisture and heat.
Modern Research
Studies confirm Cetraria islandica’s expectorant, immune-supporting, and antimicrobial effects, supporting its traditional use in herbal medicine.
Iceland Moss remains a valuable herb in traditional and modern herbal medicine, particularly for respiratory health, digestion, and immune support.