Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Lichens have a long history of use in traditional medicine, particularly in Europe, Asia, and North America. Species such as Usnea (Old Man’s Beard) and Iceland moss (Cetraria islandica) have been traditionally employed to address respiratory ailments, including lung congestion, coughs, and bronchitis. Historical texts and ethnobotanical reports note that lichens were often prepared as teas, syrups, or lozenges to soothe irritated respiratory passages and reduce symptoms of congestion. The rationale for their use was based on their mucilaginous (gel-forming) properties, which could help coat the throat and airways, providing a demulcent effect.

However, scientific validation for these effects remains limited. Some in vitro studies have detected antimicrobial and anti-inflammatory compounds in lichens, but there is little direct clinical research examining their efficacy for lung congestion in humans. The evidence supporting their use is therefore grounded more in tradition and historical practice than in modern clinical trials. As such, while lichens are still occasionally found in herbal remedies for respiratory issues, their use for lung congestion should be considered traditional and evidence rated as modest (2 out of 5) due to the lack of robust scientific studies.

More about Lichen (unspecified)
More about Congestion (lungs)

Other ingredients used for Congestion (lungs)

Other health conditions supported by Lichen (unspecified)

Products containing Lichen (unspecified)