Synopsis

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

Red root generally refers to the root of Ceanothus americanus (also known as New Jersey tea). The use of red root for treating colds is primarily based on traditional or historical herbal medicine practices, especially in North America. Indigenous peoples and early American settlers used red root as a tea or decoction for various ailments, including respiratory conditions such as colds, coughs, and sore throats. The rationale for its use was mostly empirical, based on observed effects in symptom relief and as a general tonic.

However, there is very limited scientific research supporting its antiviral activity or specific efficacy against the viruses that cause the common cold. Modern phytochemical studies have identified some tannins and alkaloids in red root, but comprehensive studies on its antiviral properties or clinical efficacy in humans are lacking. While some herbalists continue to recommend red root in blends for immune support or respiratory health, these uses are not validated by controlled scientific trials. Thus, the evidence base remains weak, and its use for colds is best considered as part of traditional herbal practice rather than an evidence-based intervention.

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Other ingredients used for Colds (antiviral)

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