Synopsis

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

Polygonatum, commonly known as Solomon’s Seal, has a longstanding history of use in traditional medicine systems such as Traditional Chinese Medicine (TCM) and Ayurveda. In TCM, species like Polygonatum sibiricum and Polygonatum odoratum (known as “Yu Zhu” or “Huang Jing”) have been used as tonics believed to nourish Yin, moisten dryness, and alleviate symptoms related to lung deficiency, such as dry or irritating coughs, including spastic coughs. Ancient texts and modern TCM pharmacopeias mention its use in treating dry lungs and chronic coughs, particularly when accompanied by symptoms of throat dryness or irritation.

However, scientific validation for these uses is limited. Most available evidence consists of in vitro studies showing anti-inflammatory or immunomodulatory effects and some animal studies suggesting potential benefits for lung health. There is a lack of high-quality clinical studies directly linking Polygonatum to relief of spastic cough in humans. Thus, its use for this indication is supported primarily by traditional practice rather than robust clinical data. The extent of traditional documentation and its inclusion in classical herbal formulas account for a moderate evidence rating for tradition, but insufficient for scientific validation.

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