Synopsis

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

Glehnia littoralis (commonly known as beach silvertop or "Bei Sha Shen" in traditional Chinese medicine) has a well-documented use in traditional East Asian medicine, particularly for soothing sore throat and dry cough. The roots are considered to have moistening and cooling properties, and are included in classical herbal formulas for conditions involving dryness of the lung and throat. Historical materia medica texts, such as the Compendium of Materia Medica (Bencao Gangmu), describe its use for "nourishing Yin" and "relieving throat discomfort."

However, while traditional use is strong, there is limited modern scientific research specifically validating its efficacy for sore throat. Some phytochemical studies have identified coumarins and polysaccharides in the root, compounds with mild anti-inflammatory or immunomodulatory activities in vitro, but clinical studies in humans for sore throat are lacking. Therefore, the evidence for Glehnia littoralis in this context is based mainly on tradition, with a modest level of indirect scientific support (preclinical only), and no robust clinical trials. Its continued use in herbal practice for sore throat reflects historical precedent rather than strong modern evidence.

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