Iceland Moss

At a Glance

Common name

Iceland Moss

Scientific name

Cetraria islandica

Family

Parmeliaceae

Region

Arctic Europe

Plant part

Whole lichen (thallus)

Caffeine

Caffeine Free

Evidence

Insufficient

Safety review

Safety information on file

Botanical Description

Not a moss but a fruticose lichen: a low clump of branching strap-like lobes with curled edges, grayish-green above with brownish undersides. Bitter and demulcent, long brewed for chest and stomach.

Also known as: Iceland Lichen, Cetraria

Historical Background

A survival food and medicine of Iceland, Scandinavia, and northern peoples, used for cough, chest complaints, and weak digestion; later adopted into European pharmacy as a demulcent and bitter tonic.

Earliest recorded uses: Cough, sore throat, loss of appetite, and as a nourishing food in scarcity.

Cultural significance: A symbol of northern resilience; ground into flour and brewed as a sustaining tea in times of famine.

1. Medieval

   Northern Europeans use Iceland moss for chest and digestive complaints.

2. Modern

   Listed in European pharmacopeias as a demulcent and bitter tonic.

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

Flavor & Aroma

Aroma: Earthy, mineral, faintly green

Tea Preparation

Modern Evidence

Mucilage (lichenin) gives demulcent effects; usnic and other lichen acids have antimicrobial interest. Clinical evidence is limited.

Evidence levels describe the state of research for the traditional use discussed here, not a recommendation. Historical use does not imply effectiveness.