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

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Synopsis

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

Grass-leaved calamus (Acorus gramineus) has a history of traditional use in various Asian medical systems, particularly in Chinese and Japanese herbal medicine, for gastrointestinal complaints including ulcers. The plant is believed to have soothing, anti-inflammatory, and digestive properties, and its rhizomes have been used to prepare decoctions or powders for internal use. However, the traditional documentation often does not specifically differentiate between peptic ulcers, gastritis, or general stomach discomfort, and the conditions treated may be described in broader terms such as "stomach pain" or "abdominal distention."

In terms of scientific validation, there is limited direct evidence regarding the efficacy of Acorus gramineus in treating ulcers. Some in vitro and animal studies on related species (such as Acorus calamus) suggest anti-inflammatory and cytoprotective effects on gastric mucosa, but these findings cannot be directly extrapolated to Grass-leaved calamus or to humans. Clinical trials in humans are lacking. Thus, while its use is supported by tradition, scientific evidence remains insufficient, and safety concerns—particularly related to the presence of potentially carcinogenic β-asarone in some Acorus species—should also be considered.

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Products containing Grass-leaved calamus

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