Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Sickle-leaf hare's ear (Bupleurum falcatum) has a long history of use in traditional herbal medicine, particularly within East Asian systems such as Traditional Chinese Medicine (TCM). In TCM, Bupleurum species are commonly included in formulas intended to "release the exterior" and to help the body expel pathogens that are thought to cause colds and flu-like illnesses. Classic formulas such as "Xiao Chai Hu Tang" (Minor Bupleurum Decoction) contain Bupleurum as a key ingredient and have been used for centuries for symptoms associated with the early stages of respiratory infections, including fever, chills, and congestion. However, the traditional use is not specifically for "prevention" of colds in the modern sense, but more for symptomatic support or to address imbalances associated with early illness.

Scientific studies evaluating Bupleurum falcatum for the prevention of colds are lacking. While some laboratory and animal studies have examined Bupleurum extracts for possible immunomodulatory or anti-inflammatory properties, there is insufficient clinical evidence to validate its use specifically for preventing the common cold in humans. The evidence supporting its use for this indication, therefore, remains rooted in tradition rather than scientific validation.

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