Synopsis

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

Yerba santa (Eriodictyon californicum) has a long history of traditional use, particularly among Native American tribes in California and the southwestern United States, for supporting respiratory health. It has been used as an herbal remedy for coughs, colds, bronchitis, asthma, and other conditions affecting the bronchial system. The leaves were commonly brewed into teas, smoked, or used as poultices for their expectorant and decongestant properties. The plant contains flavonoids and phenolic compounds, which may have mild anti-inflammatory and antimicrobial effects, but robust clinical evidence is lacking.

Modern herbalists continue to use yerba santa for its traditional indications, primarily as an expectorant to help clear mucus from the respiratory tract. However, scientific studies on the efficacy and safety of yerba santa for bronchial support are limited. While in vitro studies suggest some antimicrobial and antioxidant activities, there is insufficient clinical research to confirm its effectiveness for bronchial conditions in humans. As such, its use as a bronchial support herb is justified primarily by traditional evidence rather than by rigorous scientific validation.

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