Evidence supporting the use of: Grass-leaved calamus
For the health condition: Congestion

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Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Grass-leaved calamus (Acorus gramineus) has a history of use in traditional medicine systems, particularly in East Asia, for a variety of ailments including respiratory congestion. The plant is sometimes included in herbal remedies aimed at relieving symptoms of colds, cough, and bronchial congestion, often due to its aromatic properties, which may help in opening nasal passages or provide a soothing effect. However, there is little in the way of rigorous clinical or pharmacological evidence to directly support its efficacy for treating congestion. The traditional use typically involves inhalation of vapors or oral preparations, based on the belief in the herb's expectorant or decongestant properties, sometimes drawing from its use in related species such as Acorus calamus. Despite anecdotal reports and long-standing folk use, modern scientific studies validating these effects for Acorus gramineus specifically are lacking. Therefore, while its use is justified by tradition, the level of supporting evidence is low, and individuals should exercise caution and consult with healthcare professionals before using it for congestion.

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