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Polygala fluid extract (远志流浸膏) is a liquid herbal extract prepared from the roots of *Polygala tenuifolia*. It is widely used in Traditional Chinese Medicine (TCM) and other traditional medicine systems as an expectorant to promote the secretion of respiratory tract fluid, dilute phlegm, and facilitate its expulsion. It is also used for its sedative and cognitive-enhancing properties (anxiolytic, memory improvement). Shaanxi Fujie Pharmaceutical is a key manufacturer and developer of this extract, which is filed under the TCM extract filing system in China (filing no. ZTCB20210020陕).
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