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

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Synopsis

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

Grass-leaved calamus (Acorus gramineus) has a history of use in traditional medicine, especially within East Asian herbal practices. In Traditional Chinese Medicine (TCM) and some other Asian herbal systems, species of Acorus (including Acorus gramineus and Acorus calamus) have been employed to help alleviate symptoms associated with congestion, such as sinus issues or respiratory blockages. The roots and rhizomes are typically used, sometimes in combination with other herbs, for their purported expectorant and aromatic properties that are believed to help "open the orifices" and clear phlegm.

However, the evidence supporting these uses is largely anecdotal or based on traditional medical texts rather than modern clinical research. There are a few pharmacological studies examining related species (Acorus calamus in particular) that suggest anti-inflammatory and mild decongestant effects in animal models, but robust clinical studies in humans are lacking, and specific evidence for Acorus gramineus for sinus congestion is minimal. Additionally, safety concerns regarding certain compounds in Acorus species (notably β-asarone in Acorus calamus, though less prevalent in Acorus gramineus) have limited broader adoption.

In summary, the use of Grass-leaved calamus for sinus congestion is primarily supported by tradition, with weak to moderate evidence (rated 2/5) and little scientific validation at this time.

More about Grass-leaved calamus
More about Congestion (sinus)

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