Synopsis

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

Cowherb, also known as Vaccaria segetalis or Wang Bu Liu Xing in Traditional Chinese Medicine (TCM), has been used historically in East Asian herbal medicine. While its primary traditional applications are related to promoting blood circulation, resolving swellings, and facilitating lactation, cowherb seeds are sometimes included in herbal formulas for respiratory conditions, including lung congestion, due to their reputed ability to disperse accumulations and move Qi (vital energy). In these contexts, cowherb is seldom the main herb but may be used in conjunction with other botanicals that target phlegm and congestion in the lungs.

However, there is a lack of modern scientific studies specifically validating the efficacy of cowherb for lung congestion. Most available evidence comes from traditional usage and TCM literature rather than clinical trials or pharmacological research. Therefore, while cowherb does have a traditional basis for use in formulations addressing congestion, the overall strength of evidence is limited and does not reach high levels of scientific validation. For this reason, cowherb's use for supporting or treating lung congestion is primarily justified by tradition, with moderate evidence based on historical and empirical practice rather than rigorous science.

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