Synopsis

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

Cynanchum species, particularly Cynanchum stauntonii and Cynanchum paniculatum, have been used in traditional Chinese medicine (TCM) to support lung health and treat conditions associated with lung congestion, such as cough, phlegm, and bronchial disorders. In TCM, these herbs are often included in formulas to "resolve phlegm" and "open the lungs," which is conceptually related to treating congestion. Historical Chinese medical texts, such as the "Compendium of Materia Medica," mention the use of Cynanchum roots (commonly called Bai Qian) for these purposes. However, while there are some modern pharmacological studies suggesting anti-inflammatory and expectorant properties of certain Cynanchum extracts, robust scientific evidence from clinical trials supporting efficacy in lung congestion is lacking. Most of the current use and recommendations stem from traditional practice rather than well-controlled human studies. Therefore, the evidence base is moderate within the context of traditional usage, but limited in terms of modern scientific validation.

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